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Al-Refaie, Abbas, Mohammad D. AL Tahat i Nour Bata. "CRM/e-CRM Effects on Banks Performance and Customer-Bank Relationship Quality". International Journal of Enterprise Information Systems 10, nr 2 (kwiecień 2014): 62–80. http://dx.doi.org/10.4018/ijeis.2014040104.
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This research aims at examining the effects of customer relationship management (CRM) and electronic CRM (e-CRM) on banks performance in Jordan using structural equation modelling. Two structural models, I, and II are developed. Fourteen reputable Jordanian banks are selected. Results of Model I show that: (1) internet service function and customer support have significant influence on relationship management (RM), (2) marketing support function has insignificant influence on RM, which indicates, and (3) RM has positive influence on business performance; learning and growth, customer satisfaction, internal process, and financial perspective. Results of Model II reveal that: (1) the e-CRM significantly influences customer based-service attributes, (2) the e-CRM directly related with relationship quality (RQ), and indirectly affects RQ through customer based-service attributes, (3) RQ significantly influences customer lifetime value (CLV). In conclusions, although Jordanian banks should direct more marketing support to enable customer communicate with banks using e-CRM in a fast, easy and efficient way.
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Sugiato, Budi Jaya, Slamet Riyadi i Endah Budiarti. "The effects of customer relationship management, service quality and relationship marketing on customer retention: The mediation role of bank customer retention in Indonesia". Accounting 9, nr 2 (2023): 85–94. http://dx.doi.org/10.5267/j.ac.2022.12.004.
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This study aims to examine customer retention (CR) from the aspect of customer satisfaction with customer relationship management (CRM), service quality and marketing relations (RM). State-owned bank customers selected the research population in all branch offices in the Madura region, and data were collected through a Likert scale model questionnaire. The results of the path analysis using the structural analysis model (SEM) show that there is an influence of CRM on customer satisfaction; there is an effect of service quality on customer satisfaction; there is an effect of RM on customer satisfaction; CRM through customer satisfaction affects CR; service quality through customer satisfaction affects CR; RM through customer satisfaction affects CR; there is an effect of customer satisfaction on CR on customers. Then the simultaneous test shows that simultaneously RM, service quality, and RM impact customer satisfaction, and the value of coefficient of determination (R-Square) explains that CRM, service quality, and RM can effectively contribute to customer satisfaction. Simultaneously, CRM, service quality, and RM affect CR. CRM, service quality, and RM affect CR mediated by customer satisfaction. CRM, service quality, and RM, through customer satisfaction, can effectively contribute to CR to customers of state-owned bank Regional Offices.
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Obonyo, Dennis, Verena Nicole Uslar, Johanna Münding, Dirk Weyhe i Andrea Tannapfel. "The impact of resection margin distance on survival and recurrence in pancreatic ductal adenocarcinoma in a retrospective cohort analysis". PLOS ONE 18, nr 2 (17.02.2023): e0281921. http://dx.doi.org/10.1371/journal.pone.0281921.
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Background The prognostic effect of resection margin status following pancreatoduodenectomy for pancreatic ductal adenocarcinoma (PDAC) remains controversial, even with the implementation of standardized pathological assessment. We therefore investigated the impact of resection margin (RM) status and RM distance in curative resected PDAC on overall survival (OS), disease-free survival (DFS) and recurrence. Method 108 patients were retrieved from a prospectively maintained database of a certified pancreatic cancer center. Distribution and relationships between circumferential resection margin (CRM) involvement (CRM≤1mm; CRM>1mm; CRM≥2mm) and their prognostic impact on OS and DFS were assessed using Kaplan-Meier statistics and the Log-Rank test. Multivariate logistic regression was used explain the development of a recurrence 12 months after surgery. Results 63 out of 108 patients had medial RM and 32 posterior RM involvement. There was no significant difference in OS and DFS between CRM≤1mm and CRM>1mm resections. Clearance at the medial margin of ≥2mm had an impact on OS and DFS, (RM≥2mm vs. RM<2mm: median OS 29.8 vs 16.8 months, median DFS 19.6 vs. 10.3 months). Multivariate analysis demonstrated that age, medial RM ≥2mm, lymph node status and chemotherapy were prognostic factors for OS and DFS. Posterior RM had no influence on OS or DFS. Conclusion Not all RM seem to have the same impact on OS and DFS, and a clearance of 1mm for definition of a negative RM (i.e. CRM>1mm) seems not sufficient. Future studies should include more patients to stratify for potential confounders we could not account for. Trial registration This study was registered with the German Clinical Trials Registry (reference number DRKS0017425).
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Mooijman, K. A., i A. H. Havelaar. "Application of microbiological (certified) reference materials". Water Science and Technology 35, nr 11-12 (1.06.1997): 467–70. http://dx.doi.org/10.2166/wst.1997.0779.
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The development of microbiological reference materials (RMs) has succesfully led to the certification of six materials (CRMs) and to the production of a wider range of non-certified reference materials. Both materials (RM and CRM) are prepared in the same way. They consist of gelatin capsules filled with milk powder artificially contaminated with a selected test strain. The difference between an RM and a CRM is the degree of control of the materials. Because of this difference the RMs and CRMs differ largely in price and application. An RM is intended to be used in daily quality control (QC) of microbiological (routine) analysis. For this purpose the use of a control chart can be very useful. A CRM is intended to be used incidentally, e.g. for validation of a (new) method, or for a complete check of the performance of the laboratory and technicians. The certified value of a microbiological CRM is method dependent. A user of a CRM will compare their mean results with the given certified value and confidence limits. With a so-called power calculation technique the optimal number of capsules and replicates for a CRM were calculated.
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Denizci Guillet, Basak, i Xinchen Shi. "Can revenue management be integrated with customer relationship management?" International Journal of Contemporary Hospitality Management 31, nr 2 (11.02.2019): 978–97. http://dx.doi.org/10.1108/ijchm-01-2018-0039.
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Purpose The purpose of this study is to understand how and to what extent Hong Kong hotels have integrated customer relationship management (CRM) into their revenue management (RM) practices at individual customer level. Method Semi-structured interviews were used to gather information from experienced interviewees holding hotel RM- and marketing-related executive positions. In total, 11 revenue and 9 marketing executives were interviewed in 2016-2017 over a period of 13 weeks. The data were transcribed and then Nvivo was used for data organization and analysis. Findings The hotels do not systematically segment customers by value because of restraints on the RM systems’ capabilities and the industry’s conventional segmentations. The revenue and marketing executives’ attitudes toward integration, IT system infrastructure support to enable integration, loyalty and membership programs as a means for integration and executive management level support for integration influence the hotel’s potential for RM and CRM integration. Research Limitations/implications Only the perspectives of revenue and marketing executives were considered. Incorporating the insights of different parties may achieve a more comprehensive result. In addition, because it seems that there is no systematic RM and CRM integration within the Hong Kong hotel industry, relevant decision-makers’ opinions toward the practice may change once they evaluate the performance of the pioneering practitioner. Originality This study reveals what has been done in practice to integrate RM and CRM compared with the theoretical approach, proposes an integration framework and discusses the potential for further development together with the challenges to integration.
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Krylov, A. I., A. Y. Mikheeva, A. G. Budko i I. Yu Tkachenko. "Metrological support of phthalate content measurements: reference material for the composition of a solution of six priority phthalates in methanol". Measurement Standards. Reference Materials 17, nr 3 (13.10.2021): 5–19. http://dx.doi.org/10.20915/2687-0886-2021-17-3-5-19.
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The article provides information on the development of a new reference material (RM) for the composition of a solution of six priority phthalates (dimethyl phthalate, diethyl phthalate, di(n-butyl) phthalate, benzyl butyl phthalate, bis(2-ethylhexyl) phthalate, di(n-octyl) phthalate) in methanol provided with metrological traceability to GET 208-2019 (GET 208). The procedure for the preparation and certification of RMs is shown, including the estimation of homogeneity and stability. Pure organic substances (phthalates) characterized on GET 208 were used as the starting material for the RM. The RM material was prepared by weight and volume-weight methods. The stability study of the RM was carried out by the isochronous procedure. The RM certified values are the mass fraction and mass concentration of individual phthalates in the solution. When calculating the uncertainty budget for RM certified values, contributions from the purity of the starting materials, RM preparation procedures, heterogeneity, and long-term instability were taken into account. The relative expanded uncertainty of the certified values does not exceed 2 %. As a result, a certified reference material (CRM) was developed and approvedfor the composition of a solution of ortho-phthalic acid esters (phthalates) in methanol GSO 11366-2019. The practical significance of the application of GSO 11366-2019 is to ensure the metrological traceability of RM to the corresponding SI units reproduced on GET 208. The developed CRM can be applied in resolving any measuring tasks and performing a full range of metrological works.
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Wang, Shu, Hengxiao Guo i Jong-Hak Woo. "Estimating AGN Black Hole Masses via Continuum Reverberation Mapping in the Era of LSST". Astrophysical Journal Letters 948, nr 2 (1.05.2023): L23. http://dx.doi.org/10.3847/2041-8213/accf96.
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Abstract Spectroscopic reverberation mapping (RM) is a direct approach widely used to determine the mass of black holes (BHs) in active galactic nuclei (AGNs). However, it is very time consuming and difficult to apply to a large AGN sample. The empirical relation between the broad-line region size and luminosity (Hβ R BLR–L) provides a practical alternative yet is subject to large scatter and systematic bias. Based on the relation between the continuum emitting region size and luminosity (R CER–L) reported by Netzer (2022), we present a new BH mass estimator via continuum RM (CRM) by comparing R CER and R BLR, assuming that the continuum lags are dominated by the diffuse continuum emission. Using a sample of 21 AGNs, we find a tight R BLR–R CER relation (scatter∼0.28 dex) and that R BLR is larger than R CER at 5100 Å by an average factor of 8.1. This tight relation enables the BH mass estimation based on the CRM combined with the velocity information. Applying the relation to rest objects in our CRM sample, we demonstrate that the predicted R BLR,CRM follows the existing Hβ R BLR–L relation well and the estimated CRM BH masses are consistent with the RM/single-epoch BH masses using Hβ. This method will provide significant applications for BH mass estimation thanks to the short continuum lags and the easily accessible high-cadence, large-area photometric data, especially in the era of Legacy Survey of Space and Time.
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Sharma, Bhanu Bhakta, Bhupendra Jung Shahi i Rewan Kumar Dahal. "Customer Loyalty and Relationship Marketing in the Nepalese Telecommunications Sector". Harvest 2, nr 1 (15.05.2023): 1–16. http://dx.doi.org/10.3126/harvest.v2i1.54405.
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RM (Relationship Marketing) and CL (Customer Loyalty) have attracted a great deal of academic and professional attention over the past few decades. RM became a key trend in the marketing and management industries. Mobile communications networks have been a prominent infrastructure driving substantial economic growth in developing countries like Nepal. This study investigated CRM (Customer Relationship Marketing) and CL in the telecommunication industry in Nepal. A descriptive and causal-comparative research design has been adopted for this study as it seeks to identify the key variables of CRM and CL in the telecommunication industry in Nepal. Using survey methods, structured questionnaires with a five-point Likert scale on each dependent and independent variable were administered to obtain responses from mobile users. In this study, quantitative techniques have been used to analyze primary data collected through a survey. This study found a positive relationship between CL and its variables trust, communication, commitment, and conflict handling. Trust and commitment were the primary factors of CL in RM in the Nepalese telecom industry, with varied effects according to the measures of CL.
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KAMEYAMA, KEISUKE, KAZUO TORAICHI i YUKIO KOSUGI. "CONSTRUCTIVE RELAXATION MATCHING INVOLVING DYNAMICAL MODEL SWITCHING AND ITS APPLICATION TO SHAPE MATCHING". International Journal of Image and Graphics 02, nr 04 (październik 2002): 655–67. http://dx.doi.org/10.1142/s0219467802000822.
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This paper introduces a novel approach for contour-based shape matching named as Constructive Relaxation Matching (CRM). Relaxation Matching (RM) introduced by Rosenfeld et al. is one of the standard method for quasi-optimally solving the local correspondences of the template and input images. RM relies on an energy-minimizing nature of the dynamical system to update the label assignment to the input objects. In image matching relying on a particular modeling method, apparently similar images can be judged as being quite distant, according to the nature of the modeling process and its outcome. In the proposed CRM, the modeling stage of a novel input image contour, conventionally done in the same procedure used for modeling the templates, will be included in the procedure of iterative relaxation matching. The model of the input will be dynamically constructed during relaxation, by unifying the pairs of objects having similar template label assignment probabilities. After describing the CRM procedures, the method is applied to simple shape matching problems demonstrating the ability to adaptively model the input image during relaxation. It is shown that the proposed CRM improves the object-label correspondence for evaluation of the image similarities in the following stages of shape matching applications.
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Gupta, Ashish, i G. P. Sahu. "A Literature Review and Classification of Relationship Marketing Research". International Journal of Customer Relationship Marketing and Management 3, nr 1 (styczeń 2012): 56–81. http://dx.doi.org/10.4018/ijcrmm.2012010104.
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This paper presents a literature review and classification of Relationship Marketing (RM) research. A range of online databases were searched to gain comprehensive knowledge on RM. Several articles were identified and reviewed for their direct relevance to RM, relevant were subsequently selected. Each of these articles has been further reviewed and classified. Papers and research on RM categorized into five broad categories (Relationship Marketing – Understanding, Industry Applications, Market Development, Technological concern and Firm Performance) and further sub-categories. The most popular areas covered by the papers in the sub-category understanding of RM, Market Development; and RM general, concept, and study followed by papers in different areas of management like-retail, banking, construction etc. The bibliography provides an academic database of the literature from various journals. The classification approach provides a means to conceptualize the coverage of relationship marketing and the relative popularity of CRM topic areas. This paper provides a roster of field projects accompanied by a comprehensive bibliography that will be useful to both academics and practitioners for studying existing research as well as for contemplating future research.
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Czelakowski, J., i W. Dziobiak. "Deduction theorems within RM and its extensions". Journal of Symbolic Logic 64, nr 1 (marzec 1999): 279–90. http://dx.doi.org/10.2307/2586764.
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AbstractIn [13], M. Tokarz specified some infinite family of consequence operations among all ones associated with the relevant logic RM or with the extensions of RM and proved that each of them admits a deduction theorem scheme. In this paper, we show that the family is complete in a sense that if C is a consequence operation with CRM ≤ C and C admits a deduction theorem scheme, then C is equal to a consequence operation specified in [13]. In algebraic terms, this means that the only quasivarieties of Sugihara algebras with the relative congruence extension property are the quasivarieties corresponding, via the algebraization process, to the consequence operations specified in [13].
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Wan, Fei. "Analyzing pre-post randomized studies with one post-randomization score using repeated measures and ANCOVA models". Statistical Methods in Medical Research 28, nr 10-11 (7.08.2018): 2952–74. http://dx.doi.org/10.1177/0962280218789972.
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The analysis of covariance (ANCOVA) or repeated measures (RM) models are often used to compare the treatment effect between different arms in pre-post randomized studies. ANCOVA adjusts the baseline score as a covariate in regression models. RM treats both the baseline and post-randomization scores as outcome variables. We aim to establish the underlying connections between ANCOVA and a constrained RM (“cRM”). We start with the interrelated concepts in a pre-post randomized designs: homogeneous vs. heterogeneous study populations, the marginal vs. the conditional treatment effect, and homogeneity vs. heterogeneity of treatment effect. We then demonstrate the asymptotic equivalence between the ANCOVA and cRM estimators for the marginal treatment effect and discuss the conditions under which ANCOVA needs to include a baseline score by treatment interaction term. In particular, an ANCOVA interaction model with a mean centered baseline score can assess both the marginal treatment effect and the heterogeneity in the conditional treatment effect. However, the ordinary least squares (OLS)-based inference is not valid for unconditional inference because this interaction model typically has heteroskedastic errors, and ordinary least squares treats the sample mean of the baseline score as a known parameter. We propose a bootstrap and a heteroskedasticity consistent variance estimator for heteroskedastic ANCOVA. Our simulation studies demonstrate that the proposed methods provide valid inferences for testing both the marginal treatment effect and the heterogeneity of treatment effect using an ANCOVA interaction model. We used an acupuncture headache trial to elucidate the proposed approaches.
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Deprez, Liesbet, Brigitte Toussaint, Ingrid Zegers, Heinz Schimmel, Denis Grote-Koska, Rainer Klauke, F. Javier Gella i in. "Commutability Assessment of Candidate Reference Materials for Pancreatic α-Amylase". Clinical Chemistry 64, nr 8 (1.08.2018): 1193–202. http://dx.doi.org/10.1373/clinchem.2018.289744.
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Abstract BACKGROUND Measurement standardization of the catalytic concentration of α-amylase in serum is based on 3 pillars: the primary reference measurement procedure (PRMP), reference laboratories, and suitable certified reference materials (CRMs). Commutability is a prerequisite when using a CRM for calibration and trueness control of routine methods or for value transfer from the PRMP to end-user calibrators of routine methods through a calibration hierarchy. METHODS We performed a commutability study with 30 serum pools and 5 candidate reference materials (RMs) for pancreatic α-amylase using an automated version of the PRMP and 5 different routine methods. Four candidate RMs had an artificial matrix, each with a different composition, and 1 candidate RM was based on human serum. Data were analyzed according to a linear regression analysis with prediction interval as described in the Clinical and Laboratory Standards Institute guideline EP30-A and a difference in bias analysis as described in the recommendations of the IFCC Working Group on Commutability. RESULTS The commutability profile of the 4 candidate RMs with an artificial matrix was variable. Only 1 candidate RM, with human serum albumin in the matrix, showed a good profile like that of the candidate RM based on serum. The comparison of both commutability assessment approaches indicated some differences because of inconclusive results for the difference in bias approach, suggesting a large uncertainty on the commutability assessment. CONCLUSIONS A CRM for pancreatic amylase in an artificial matrix can be commutable for routine methods using the same substrate as the PRMP, but the matrix composition is crucial.
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Wahab, Samsudin. "The Evolution of Relationship Marketing (RM) Towards Customer Relationship Management (CRM): A Step towards Company Sustainability". Information Management and Business Review 1, nr 2 (15.12.2010): 88–96. http://dx.doi.org/10.22610/imbr.v1i2.875.
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This paper provides an overview of relationship marketing (RM) and how it evolves to customer relationship management (CRM). Since marketing continuum is the basic concept for relationship marketing it is apt that marketing continuum is explained first. The reviewed literature than discussed the evolution of marketing from the four P’s principle towards more challenge structure combining environment factors and global market scenario ending with customer relationship management philosophy. This paper developed from the rational theories that are very relevant for the practitioners’ who are alert to the environmental changes. This paper ends with more applicable of customer relationship management concepts that are most recent tools to be considered for company growth and sustainability in the millennium age.
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Wu, Shwu-Ing, i Chien-Lung Lu. "The relationship between CRM, RM, and business performance: A study of the hotel industry in Taiwan". International Journal of Hospitality Management 31, nr 1 (marzec 2012): 276–85. http://dx.doi.org/10.1016/j.ijhm.2011.06.012.
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Aikawa, Priscila, Angelica Rossi Sartori Cintra, Abelardo Soares de Oliveira Junior, Claudio Tafarel Mackmillan da Silva, Juliana Dale Pierucci, Max dos Santos Afonso, Maicon de Pinho Souza i Felipe da Silva Paulitsch. "Reabilitacao cardiaca em pacientes submetidos a cirurgia de revascularizacao do miocardio". Revista Brasileira de Medicina do Esporte 20, nr 1 (styczeń 2014): 55–58. http://dx.doi.org/10.1590/s1517-86922014000100011.
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INTRODUÇÃO: Os programas de reabilitação cardíaca (PRC) vêm diminuindo a morbidade e a mortalidade em pacientes após cirurgias de revascularização do miocárdio (CRM). OBJETIVO: Observar a adesão de pacientes submetidos à CRM isoladamente na fase tardia a um PRC e analisar a qualidade de vida e capacidade funcional antes e após o treinamento físico de três meses de PRC. MÉTODOS: Foram contatados todos os pacientes submetidos à CRM isoladamente no período de um ano para participarem de um PRC com duração de três meses com três sessões semanais de uma hora de duração. Todos os pacientes realizaram exames bioquímicos de sangue, teste de força muscular de uma repetição máxima (1-RM) para membros superiores e inferiores, teste de caminhada dos 6 minutos (TC6) e responderam o questionário de qualidade de vida SF-36 antes e após o treinamento. RESULTADOS: De todos os 86 pacientes contatados, apenas 13% (n = 11) concluíram o PRC. A média de idade foi 67 ± 9 anos. O sexo masculino foi predominante, 73% (oito homens). Não houve alterações significativas nos exames bioquímicos laboratoriais. No TC6 houve um aumento significativo na distância percorrida (p = 0,014); quanto à força muscular houve um aumento significativo na carga para o teste em membros superiores (p = 0,043); e no questionário SF-36 não observamos diferenças significativas nos escores antes e depois dos três meses de PRC. CONCLUSÃO: A adesão ao PRC foi baixa, logo é de suma importância a divulgação da participação de pacientes que realizaram CRM nesses programas para proporcionar maior capacidade funcional.
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Alshurideh, Muhammad Turki. "A Theoretical Perspective of Contract and Contractual Customer-Supplier Relationship in the Mobile Phone Service Sector". International Journal of Business and Management 12, nr 7 (9.06.2017): 201. http://dx.doi.org/10.5539/ijbm.v12n7p201.
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Both contracts and contractual relationships as concepts have been rarely discussed from scholars’ perfectives in the Relationship Marketing (RM) branch of learning. Reviewing these concepts in the customer-service sector adds value because the majority of mobile service firms are losing their current contracted customers at a significant rate despite practicing different RM activities to retain active ones. Thus, this study introduces the concept of Contractual Customer Relationship Marketing (C-CRM) for the first time to the RM field of study and discusses how to employ Contractual Relationship Marketing (C-RM) especially in the use of contractual bonds to establish, maintain and extend customer-supplier relationships.This study targets various issues that are interrelated to the use of contracts to maintain and retain valuable customers in the mobile service sector. To explore these issues, this paper focuses on extending an understanding of contracts and their use in the contractual customer-supplier relationships. This requires an overview of the study’s topic in section one, with section two outlining the study’s importance. Section three provides an overview of the contract meaning and section four explaining the main benefits of using business contracts. Section five discusses the importance of using contracts for customer retention, then section six considers the contractual use in renewable situations, section seven reviews the relationship between contract use and customer switching, section eight explains how to employ contracts in prolonging customer-supplier relationships, and, finally, the concluding remarks are made in section nine.
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Gulyaeva, A. Yu, A. Y. Khrushchev, S. V. Kolyachkina, V. B. Muravieva i S. V. Antonova. "Certified Reference Material of Tylosin Tartrate". Measurement Standards. Reference Materials 19, nr 2 (10.04.2023): 35–46. http://dx.doi.org/10.20915/2077-1177-2023-19-2-19-34.
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To date, antibiotics are often used in the treatment of infectious diseases in medicine and veterinary medicine, as well as growth promoters in animal husbandry. The uncontrolled use of antibiotics leads to antibiotic residues in food products that are easily transmitted to humans through food chains. Due to these undesirable effects, as well as in connection with the circulation of substandard and counterfeit medicinal products, it is necessary to control the quality of medicinal products, as well as monitor the food safety of animal products by determining the content of drug residues using reference materials (RMs).The aim of this research was to develop a CRM for the composition of tylosin tartrate.In the course of the research, a method for preparing the initial RM was tested and successfully implemented, a critical analysis of methods for measuring the content of tylosin tartrate was carried out, and the choice of the HPLC method as the main method for quantitative determination of the certified value of the measured quantity (mass fraction of tylosin) was justified. The disadvantages of the microbiological method and the titrimetry method as alternative methods were shown. In accordance with RMG 93–2015 and GOST ISO Guide 35–2015, the standard uncertainty of the RM certified value from the characterization method, heterogeneity and instability of the material was estimated. The expanded uncertainty of the certified value was calculated. The result of the work performed was the approval of a new type of the CRM for the composition of tylosin tartrate GSO 11632 2020.Normalized metrological characteristics: the mass fraction of tylosin is 800–1100 µg/mg, the relative expanded uncertainty at k = 2, P= 0.95 is 6%. The CRM is stored in sealed ampoules separately from food and feed in a dry and dark place at a temperature from plus 4 °C to minus 18 °C, the shelf life of the CRM is 4 years.The practical significance of the results obtained makes it possible to expand the possibility of certification of measurement methods and control of the accuracy of the measurement results of the mass fraction of tylosin in veterinary medicinal products, food and food raw materials, animal feed, and environmental objects. The CRM can also be used to identify tylosin in medicinal products and to determine the susceptibility of pathogens to tylosin.
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Aikawa, Priscila, Luis Ulisses Signori, Melina Hauck, Ana Paula Cardoso Pereira, Renata Gomes Paulitsch, Claudio Tafarel Mackmillan da Silva, William Peres i Felipe da Silva Paulitsch. "EFEITOS DO TREINAMENTO FÍSICO NO ENDOTÉLIO APÓS CIRURGIA DE REVASCULARIZAÇÃO". Revista Brasileira de Medicina do Esporte 21, nr 6 (grudzień 2015): 467–71. http://dx.doi.org/10.1590/1517-869220152106149074.
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Introdução A cirurgia de revascularização do miocárdio (CRM) é uma das mais frequentes cirurgias realizadas em todo o mundo, muitos estudos vêm relatando os benefícios do treinamento físico para a melhora da capacidade funcional, porém há poucos estudos sobre os efeitos na função endotelial vascular. Objetivo Analisar os efeitos do treinamento físico sobre a função endotelial vascular em pacientes submetidos à CRM, isoladamente na fase tardia da reabilitação após seis meses de programa de reabilitação cardíaca (PCR). Métodos Foram incluídos pacientes que haviam sido submetidos à CRM no período máximo de um ano após a cirurgia. O PRC foi empregado durante seis meses consecutivos, com três sessões semanais. Todos os pacientes realizaram exames laboratoriais, teste de força muscular de uma repetição máxima (1-RM) para os membros superiores e inferiores, teste de caminhada de 6 min (TC6M) e avaliação da função endotelial através da técnica de vasodilatação mediada pelo fluxo. Resultados Onze pacientes iniciaram o PRC, porém nove pacientes o completaram. A média de idade foi de 66 anos (50 a 82 anos) e o sexo masculino foi predominante (55,6%). Houve mudanças significativas nos exames laboratoriais bioquímicos: aumento do colesterol total (Basal: 162 ± 31mg/dL vs. 195 ± 39mg/dL; P=0,012) e diminuição da hemoglobina glicada (Basal: 6,74 ± 1,64% vs. 6,26 ± 1,62%; P=0,028). A força muscular aumentou significativamente nos membros superiores e inferiores (P=0,030 e P=0,038, respectivamente); no TC6M observou-se um aumento significativo de 20% na distância percorrida (P=0,020) após seis meses consecutivos de treinamento e houve uma melhora na vasodilatação mediada pelo fluxo (Basal: 6,35 ± 3,92% vs. 6 meses: 9,90 ± 4,19%; P=0,026). Conclusão O treinamento combinado realizado em seis meses ajudou a melhorar a função endotelial e a capacidade funcional de pacientes sedentários que foram submetidos à CRM na fase tardia da reabilitação.
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Пасечник, Лилия Александровна, Ирина Сергеевна Медянкина, Светлана Александровна Бибанаева i Сергей Павлович Яценко. "MECHANISM AND KINETICS OF NEUTRALIZATION OF COPPER-CONTAINING SOLUTIONS WITH MODIFIED RED SLURRIES OF ALUMINA PRODUCTION". Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials, nr 12() (15.12.2020): 681–96. http://dx.doi.org/10.26456/pcascnn/2020.12.681.
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Предложены методы модификации красных шламов (КШ) обработкой соляной кислотой и карбонизацией с получением сорбционных материалов, пригодных для извлечения металлов из кислых растворов. Модификация КШ карбонизацией способствует увеличению площади и объема пор в карбонизированном шламе (КШК), что привело к более высокой сорбционной емкости до 246 мг Cu /г, при одновременной нейтрализации сернокислого медьсодержащего раствора с 1,5 до 4,5 единиц pH . Кислотная обработка приводит к меньшим положительным эффектам по извлечению меди. Кинетика сорбции описывается уравнениями как псевдо-первого порядка ( R > 0,96 ), так и псевдо-второго ( R > 0,98), определяя равнозначные вклады в общую скорость процесса стадий массопереноса и взаимодействия ионов. При изучении механизма установлено, что поверхностные диффузионные процессы на границе «твердое - жидкое» переходят в массоперенос ионов Cu и химическое взаимодействие с функциональными группами на поверхности и внутри частиц модифицированных шламов. Для исходного шлама эти процессы практически эквивалентны. Десорбция меди водой и раствором этилендиаминтетрауксусной кислотой (ЭДТА) показала, что прочность связей в структуре КШК- Cu и устойчивость поверхностных тройных комплексов Cu -ЭДТА-КШК оказывается выше, чем Cu -ЭДТА-КШ. Показана перспектива создания сорбционных материалов на основе промышленных отходов, в частности щелочных красных шламов, и их применение для поглощения токсичных металлов из кислых сточных вод с взаимной нейтрализацией и утилизацией разных видов техногенных отходов металлургических производств -твердых, газообразных и жидких. Methods for modification red mud (RM) by treatment with hydrochloric acid and by carbonization to obtain sorption materials for extracting metals from acidic solutions are proposed. Modification of the RM by carbonation increases the area and volume of pores in the carbonized red mud (CRM), that leads to a higher sorption capacity up to 246 mg/g with simultaneously neutralization of the copper solution from 1,5 to 4,5 pH . The acid treatment leads to less positive effects on the extraction of copper. The sorption kinetics is described by both pseudo-first-order (R >0 ,96) and pseudo-second-order (R > 0,98) equations, which determine the equivalent contributions to the overall speed of the process of the mass transfer and the ion interaction stages. A mechanism was studied and it was found that surface diffusion processes at the «solid-liquid» interface turn into the mass transfer of Cu ions and chemical interaction with functional groups on the surface and inside the particles of modified muds. For the initial mud, these processes are almost equivalent. Desorption of copper with water and a solution of ethylenediaminetetraacetic acid (EDTA) has shown that the strength of bonds in the structure of CRM- Cu and the stability of surface triple complexes Cu -EDTA-CRM are higher than for Cu -EDTA-RM. The potential have been demonstrated of creating sorption materials by used industrial waste, in particular alkaline red slurries, and their applications for the absorption of toxic metals from acidic wastewater for mutual neutralization and utilization of industrial waste from metallurgical industries - solid, gaseous and liquid.
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Vilanó, Marc, i Roser Rubio. "Determination of Arsenic in Seafood by Focused Microwave Digestion and Hydride Generation–Atomic Fluorescence Detection". Journal of AOAC INTERNATIONAL 84, nr 2 (1.03.2001): 551–55. http://dx.doi.org/10.1093/jaoac/84.2.551.
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Abstract A new method was developed for total arsenic determination in seafood products such as oysters, mussels, tuna fish, and algae. Matrix decomposition and oxidation to arsenate of all the arsenic compounds in the product were completed in 25 min by using a 3-step program of focused microwaves (40–120 W) with nitric and sulfuric acids. Quantitation was performed by hydride generation-atomic fluorescence detection (HG–AFS). Results of method optimization are presented and discussed. A detection limit <125 μg/kg arsenic was obtained; the quantitation limit was close to 400 μg/kg, with repeatability and reproducibility <5% relative standard deviation. Validation was performed by analyzing 4Reference Materials (arsenic concentration expressed as mg/kg): The National Institute of Standards and Technology SRM 1566a Oyster tissue (14.0 ± 1.2); the Bureau Community of Reference (now Standard Measurements & Testing Program) CRM 278 Mussel tissue (5.9 ± 0.2) and CRM 627 Tuna fish (4.8 ± 0.3); and the International Atomic Energy Agency RM 140 Fucus sample (44.3 ± 2.1).
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Kornilova, O. G., M. A. Krivykh, R. A. Volkova i I. B. Borisevich. "Reference materials used for specific safety evaluation of human immunoglobulin and human albumin products: features of development, certification and application". Reference materials 14, nr 3-4 (2.04.2019): 33–41. http://dx.doi.org/10.20915/2077-1177-2018-14-3-4-33-41.
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Human immunoglobulin and human albumin products can negatively affect patients’ health. The residual content of haemagglutinins, anti-D antibodies, prekallikrein activator, as well as the level of anticomplementary activity, are controlled during both production and testing for compliance with normative documentation. Methods for their quantitative evaluation are based on the effects of erythrocytes hemolysis or agglutination and on the amidolytic product properties of cascade reactions. These methods require the obligatory use of reference materials (RMs). The development of RMs, acting as the carrier of the quantitative characteristics of the human immunoglobulins and human albumin impurities, is fraught with the difficulty of selecting a candidate, substantiating the certification methodology, and determining the relevant characteristics. In this research, we used human immunoglobulin solutions with normalized haemagglutinin content, anti-D antibodies or anti-complementary activity in a different range, whose quality was studied using haemagglutination and chromogenic methods, and the complement fixation test. Methodological approaches to the RM development and certification were justified using system analysis and forensic audit methods. The results demonstrate the necessity of using RMs to assess the stability of analytical work by applying anti-complementary activity determination, haemagglutinin content or anti-Dantibody methods. It is established that RMs allow the quantitative content of haemagglutinins, anti-D antibodies and prekallikrein activator to be established. The value of the CRM characteristics should be approximated to the qualitative composition of these impurities in the analysed products, but in amounts not detectable (to produce negative RM components) or exceeding permissible maxima (to produce positive RM components).
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Lee, Hye Won, Eunjin Kim, Inye Na, Chan Kyo Kim, Seong Il Seo i Hyunjin Park. "Novel Multiparametric Magnetic Resonance Imaging-Based Deep Learning and Clinical Parameter Integration for the Prediction of Long-Term Biochemical Recurrence-Free Survival in Prostate Cancer after Radical Prostatectomy". Cancers 15, nr 13 (29.06.2023): 3416. http://dx.doi.org/10.3390/cancers15133416.
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Radical prostatectomy (RP) is the main treatment of prostate cancer (PCa). Biochemical recurrence (BCR) following RP remains the first sign of aggressive disease; hence, better assessment of potential long-term post-RP BCR-free survival is crucial. Our study aimed to evaluate a combined clinical-deep learning (DL) model using multiparametric magnetic resonance imaging (mpMRI) for predicting long-term post-RP BCR-free survival in PCa. A total of 437 patients with PCa who underwent mpMRI followed by RP between 2008 and 2009 were enrolled; radiomics features were extracted from T2-weighted imaging, apparent diffusion coefficient maps, and contrast-enhanced sequences by manually delineating the index tumors. Deep features from the same set of imaging were extracted using a deep neural network based on pretrained EfficentNet-B0. Here, we present a clinical model (six clinical variables), radiomics model, DL model (DLM-Deep feature), combined clinical–radiomics model (CRM-Multi), and combined clinical–DL model (CDLM-Deep feature) that were built using Cox models regularized with the least absolute shrinkage and selection operator. We compared their prognostic performances using stratified fivefold cross-validation. In a median follow-up of 61 months, 110/437 patients experienced BCR. CDLM-Deep feature achieved the best performance (hazard ratio [HR] = 7.72), followed by DLM-Deep feature (HR = 4.37) or RM-Multi (HR = 2.67). CRM-Multi performed moderately. Our results confirm the superior performance of our mpMRI-derived DL algorithm over conventional radiomics.
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Amin, Ruhul. "Credit Risk Management of Jamuna Bank Limited". ABC Research Alert 4, nr 1 (30.04.2016): Bangladesh. http://dx.doi.org/10.18034/ra.v4i1.302.
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Banks are exposed to five core risks through their operation, which are – credit risk, asset/liability risk, foreign exchange risk, internal control & compliance risk, and money laundering risk. Among these risks management of credit risk gets most attention. Credit risk arises due to the possibility that the borrower may fail to repay the loan. Following the recent global financial crisis, which originated from poor management of credit risk, credit risk is the most discussed topic in banking industry. All commercial banks operating in Bangladesh are strictly regulated by Bangladesh Bank. Bangladesh Bank has provided a guideline for credit risk management. All banks try to comply with that guideline. Jamuna bank is no exception of this practice. JBL has segregated the credit related activities. Marketing, preparation of credit proposal, other documentation, credit disbursement, credit monitoring etc are done at branch level. Credit administration and credit risk management related works are done at head office. At branch level, branch managers act as Relationship Manager (RM) to explore/find new business opportunities. If a new business is located he informs Head of Corporate Division using a call report. Corporate Division shall examine the call reports and communicate their initial views to the Branch about the proposed business. If the views are positive, HO will direct the concerned RM to send a complete business proposal to Corporate Division. Then the Branch submits complete proposal to H.O. CRM examines the proposal from different angles of risk and compliance and communicate their views. Then the proposal is sent to credit review committee by corporate division. CRM simply presents their observations. Credit Review Committee provides their views about the proposal which has to be approved by the M.D. corporate division may amend/change their proposal according to the recommendation of credit review committee. The Managing Director shall approve the facility if it is within power. If Board/EC approval is required, the Memo is to be signed by the Managing Director. After approval the CRM shall issue sanction advice enclosing documentation check list with a copy to credit Administration Division. When a party approaches JBL for a loan, a loan proposal is prepared at branch level, which includes credit risk assessment report, credit risk grading report besides recommended amount of loan that can be disbursed. This proposal is sent to the Head Office for approval. If Credit Administration Department of Head Office sanctions the proposal then the amount is disbursed to that party. Monitoring the loan after disbursement is the branch’s responsibility. All loan applicants are required to submit financial statements of past three years. Relevant financial performance indicators are put into a spreadsheet to assess the credit risk. JBL has a credit policy guideline which is in line with the guideline provided by Bangladesh Bank. Different weights are given to different factors like industry profitability, company size, debt burden ratio, previous loan performance etc.
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Chahidi, Hassan, Hamid Bounouira, Hamid Amsil, Abdelmajid Choukri, Khalid Embarch, Abdessamad Didi, Ilias Aarab, Khalid Laraki i Hamid Marah. "Comparison of relative and k0 neutron activation analysis methods at MA-R1 TRIGA MARK II Research Reactor of CNESTEN (Morocco)". E3S Web of Conferences 336 (2022): 00054. http://dx.doi.org/10.1051/e3sconf/202233600054.
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Since the installation of the TRIGA MARK II reactors in the National Centre for Nuclear Energy, Science and Technology (CNESTEN), Neutron Activation Data Analysis software (NADA) for neutron activation analysis (NAA) based on the relative method was the first software used; Over the years, the neutron activation analysis laboratory has been seeking to develop other softwares based on k0-INAA standardization namely the K0-IAEA software and the k0 software for Windows. In this paper we will focus on the comparison between the performance of k0 software for Windows and NADA. We compared the results obtained by the NADA Software and k0 for windows for the same input parameters (sample mass, nuclear data, net peak area for the same gamma line and cooling measurement times). In the neutron activation analysis laboratory of the National Center for Nuclear Energy, Science and Technology (CNESTEN) we analysed several reference materials (RM) or certified reference materials (CRM) and WEPAL samples. In this analysis, only certified or recommended values were used to compare the two processes for the different elements.
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Li, Xiaohua, i Jizhong Shen. "An Algorithm for Identifying Symmetric Variables in the Canonical Reed–Muller Algebra System". Journal of Circuits, Systems and Computers 25, nr 10 (22.07.2016): 1650126. http://dx.doi.org/10.1142/s0218126616501267.
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To simplify the process for identifying 12 types of symmetric variables in the canonical Reed–Muller (CRM) algebra system, we propose a new symmetry detection algorithm based on AND-XOR expansion. By analyzing the relationships between the coefficient matrices of sub-functions and the order coefficient subset matrices based on AND-XOR expansion around two arbitrary logical variables, the constraint conditions of the order coefficient subset matrices are revealed for 12 types of symmetric variables. Based on the proposed constraints, the algorithm is realized by judging the order characteristic square value matrices. The proposed method avoids the complicated process for separating the AND–XOR expansion coefficients into different groups in the Reed–Muller transform methods and solves the problem of completeness in the RM type decomposition map method. The application results show that, compared with traditional methods the new algorithm is an optimal detection method in terms of applicability of the number of logical variables, detection types, and complexity of the identification process. The algorithm has been implemented in C language and tested on MCNC91 benchmarks. Experimental results show that the proposed algorithm is convenient and efficient.
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Stepanovskikh, V. V. "60<sup>th</sup> anniversary of the Institute for Certified Reference Materials! Russian reference materials: history in persons". Industrial laboratory. Diagnostics of materials 89, nr 2(II) (2.03.2023): 5–20. http://dx.doi.org/10.26896/1028-6861-2023-89-2-ii-5-20.
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In 2023, the Institute for Reference Materials will celebrate its 60th anniversary. The main stages of the development of the Institute, the results of activities during the past years are considered. The All-Union Institute for Standard Samples and Spectral Standards (VNIISO) was established in 1963 in Sverdlovsk. Yuri L. Pliner was appointed Director of the Institute, Deputy Director for Research — Vasily V Stepin. For the first 10 years, the institute has developed 225 reference materials (RM) of raw materials and materials for metallurgical production. Samples for the ferrous metals’ spectral analysis were developed especially rapidly, their number increased by 2.3 times. The Institute was transformed into ISO TsNIIchermet in 1974 and included in the Central Research Institute of Ferrous Metallurgy named by I. R Bardin. The branch system of CRMs created in the years ahead ensured the reliability of quality control of raw materials and products of the metallurgical complex. The duties of the Head Organization of the Metrological Service of the Ministry of Ferrous Metallurgy of the USSR for measurements of the chemical composition and standard samples were assigned to the institute in 1978. The system of metrological control (MK) was created and introduced into the practice of analytical laboratories at subsequent period (1978 - 1985). Metrological requirements for CRM, measurement methods certification and normatives for operational, internal and external analysis results quality control were established by ISO TsNIIchermeta. Verification of the implementation of MC in analytical laboratories of the metallurgical industry was carried out in the process of their metrological certification, which was carried out by the leading specialists of the institute since 1982. In 1992, the Institute was transformed into a JSC “The Institute for Certified Reference Materials” (ICRM). The Institute is accredited in accordance with the requirements of the International Standard ISO 17034 as a RM producer, in accordance with the requirements of GOST ISO/IEC 17043 as a proficiency provider. The testing analytical center of ICRM is accredited in accordance with GOST ISO/TEC 17025. The article presents the institute’s and its staff current state data.
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Chugunova, M. M., N. Yu Gryazskikh, I. N. Zyablikova, A. V. Ivanov i A. N. Shobina. "Luminescence measurements: reference materials for composition of sodium adenosine triphosphate aqueous solution". Measurement Standards. Reference Materials 17, nr 3 (13.10.2021): 35–44. http://dx.doi.org/10.20915/2687-0886-2021-17-3-35-44.
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The authors evaluated the possibility of using the luminometry method which allows checking the level of sanitation and hygiene in industries and is one of the most effective methods of «rapid microbiology». Such key stages of development of reference material for sodium adenosine triphosphate with the certified values as analysis of similar reference materials, selection of source material of the reference material, conducting experimental studies, and establishing the metrological characteristics of reference material with traceability to state primary measurement standard were provided in the paper. Considering that the selective optical density at the characteristic wavelength is directly proportional to the concentration of the absorbing component (sodium adenosine triphosphate), the stability of R M was studied by spectrophotometry. The stability of the RM material to assess the uncertainty of the measurement results was carried out by the isochronous method. The result of the study is the possibility of ensuring the traceability of measurement results based on luminescence to primary measurement standard by sodium adenosine triphosphate concentration. In addition to the above, the authors selected the optimal value of that concentration and established metrological properties for GSO 11606-2020 R M for the composition of sodium adenosine triphosphate aqueous solution (mass concentration: from 0,09 to 0,11 g/dm3; extended uncertainty: 0,015 g/dm3). Usage of this CRM in performing tests, calibrations, and verification of measuring instruments allows providing the unbiased assessment of the measuring capabilities of luminescent measuring instruments, including in terms of determining the error of the measurements carried out.
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Cavalcanti Filho, José Leite Gondim, Léa Mirian Barbosa da Fonseca, Romeu Côrtes Domingues, Roberto Côrtes Domingues, Luiz Souza de Machado Neto i Emerson Leandro Gasparetto. "PET-RM neurológico com FDG-18F: ensaio iconográfico". Radiologia Brasileira 43, nr 3 (czerwiec 2010): 195–201. http://dx.doi.org/10.1590/s0100-39842010000300012.
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A integração da tomografia por emissão de pósitrons (PET) com a ressonância magnética (RM) tem sido alvo de diversos estudos nos últimos anos. O PET é a modalidade de imagem mais sensível e específica na detecção de alterações metabólicas, entretanto, apresenta limitada resolução espacial. Por outro lado, a RM apresenta importante resolução espacial, além de avaliar estruturas com intensidade de sinal de partes moles com excelente contraste. O objetivo deste estudo é demonstrar, na forma de ensaio iconográfico, as potenciais aplicações clínicas da fusão de imagens de PET e RM. Os exames foram realizados em aparelho PET dedicado utilizando como radiofármaco a fluordeoxiglicose-18F (FDG) e corregistrados com RM de 1,5 T ou 3 T do encéfalo. A fusão por programa de imagens do cérebro tem acurácia já bem estabelecida. Consegue-se, assim, importante sinergia de um estudo funcional de PET com excelente detalhamento anatômico da RM. As aplicações clínicas mais atraentes dessa abordagem são a avaliação da zona epileptogênica em pacientes refratários ao tratamento medicamentoso, identificação dos pacientes com déficit cognitivo com maior risco de progressão para demência e distinção de demências e síndromes parkinsonianas.
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Santos, Luciano Sá Teles de Almeida, i Jefferson Petto. "Repetição máxima de movimentos resistidos com pesos livres em indivíduos com cardiomiopatia chagásica". Revista Brasileira de Fisiologia do Exercício 10, nr 3 (10.09.2011): 142. http://dx.doi.org/10.33233/rbfe.v10i3.3436.
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No Brasil aproximadamente 3 milhões de pessoas são portadoras da Doença de Chagas (DC). O objetivo deste estudo foi avaliar se existe diferença significante no número de repetições máximas de exercícios resistidos (ER) realizados com pesos livres em indivíduos com DC. Participaram 11 indivíduos com cardiomiopatia chagásica, divididos em dois grupos: sintomático (GS) e assintomáticos (GA). Todos foram submetidos ao teste de 1RM adaptado para cardiopatas e o de repetições máximas (RM) com 30% da carga máxima de quatro movimentos resistidos. Na análise das RM dos movimentos, a flexão de joelho apresentou diferença estatística significante quando comparada com a abdução de ombro e a flexão de ombro no GS, enquanto que no GA houve diferença entre a flexão de ombro e a flexão coxo femoral e flexão de joelho. Conclui-se que a determinação da RM para indivíduos com DC deve ser individualizada e determinada para cada movimento do programa de ER.Palavras-chave: exercício físico, cardiomiopatia chagásica, exercício resistido, repetições máximas.
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Pereira, Patrick Nunes, Adriana Yoshida, Luís Otavio Sarian, Ricardo Hoelz de Oliveira Barros, Rodrigo Menezes Jales i Sophie Derchain. "Assessment of the performance of the O-RADS MRI score for the evaluation of adnexal masses, with technical notes". Radiologia Brasileira 55, nr 3 (maj 2022): 137–44. http://dx.doi.org/10.1590/0100-3984.2021.0050.
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Abstract Objective: To assess the performance of the Ovarian-Adnexal Reporting and Data System Magnetic Resonance Imaging (O-RADS MRI) score in the evaluation of adnexal masses and to provide technical notes about its current MRI parameters and concepts. Materials and Methods: This was a prospective study of 226 patients with 287 adnexal masses (190 submitted to surgery or biopsy and 97 followed for at least one year). We calculated the sensitivity, specificity, positive predictive value, and negative predictive value for the O-RADS MRI score, using ≥ 4 as the cutoff for malignancy. We performed a technical analysis of the main updates to the score, announced in September 2020 by the American College of Radiology, in comparison with the original (2013) version. Results: We found that an O-RADS MRI score of 4 or 5 was associated with malignancy of an adnexal mass, with a sensitivity of 91.11% (95% CI: 83.23-96.08), specificity of 94.92% (95% CI: 90.86-97.54), positive predictive value of 89.13% (95% CI: 81.71-93.77), negative predictive value of 95.90% (95% CI: 92.34-97.84), and overall accuracy of 93.73% (95% CI: 90.27-96.24). Conclusion: Our findings support the use of the O-RADS MRI score for evaluating adnexal masses, especially those considered indeterminate on ultrasound. The updates made recently to the O-RADS MRI score facilitate its interpretation and will allow its more widespread use, with no loss of diagnostic accuracy.
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Olcay Barreda, Rubén Heriberto, i George Eduardo Sales Valadão. "CARACTERIZACÃO DE PASTAS MINERAIS PRODUZIDAS COM LAMAS DE REJEITOS METÁLICOS E NÃO METÁLICOS". HOLOS 3 (31.03.2020): 1–9. http://dx.doi.org/10.15628/holos.2020.9254.
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A disposição de rejeitos como pasta possui várias vantagens em comparação às disposições convencionais, por exemplo: utiliza uma área menor, melhora a recuperação de água, maior segurança operacional das barragens, etc. Neste trabalho foram caracterizadas as pastas preparadas com rejeitos de manganês e fosfato. Na caracterização dos sólidos foram determinadas: análise granulométrica, determinação do peso específico e identificação das principais espécies mineralógicas. Nas pastas foram determinadas: altura de abatimento, ângulo de repouso (preliminar) e algumas propriedades reológicas (viscosidade e tensão de escoamento). Os principais resultados foram: i) Espécies mineralógicas predominantes no rejeito manganês (RM): Pirolusita e Caulinita, no rejeito fosfático (RF): Calcita e Dolomita; ii) O tamanho médio dos sólidos foram 6,23µm (RM) e 4,76µm (RF); iii) O RM e RF apresentam características de pasta desde 50% e 70% sólidos em massa respectivamente; iv) Foram atingidos ângulos de repouso superiores a 8° (RM) e 16° (RF); v) A viscosidade do RF foram superiores que o RM; vi) As tensões de escoamento do RM e RF aumentam exponencialmente desde 45% e 65% sólidos em massa respectivamente.
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Jambassi Filho, Danilo Calori José Claudio, André Luiz Demantova Gurjão, Raquel Gonçalves, Sandra Aires Ferreira i Sebastião Gobbi. "Efeito agudo de diferentes intensidades de exercício com pesos no desempenho muscular de idosas treinadas". Revista Brasileira de Medicina do Esporte 18, nr 6 (grudzień 2012): 365–68. http://dx.doi.org/10.1590/s1517-86922012000600003.
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O objetivo do presente estudo foi comparar a resposta aguda da sustentabilidade das repetições e do volume de sessões de exercício com pesos realizados com diferentes intensidades, em idosas treinadas. Fizeram parte deste estudo 16 idosas (68,3 ± 6,0 anos; 69,8 ± 10,6kg; 157,6 ± 6,5cm). Após a determinação das cargas referentes a 15 repetições máximas (RM) no exercício leg press, duas sessões experimentais (intervaladas por 48-72 horas) foram conduzidas adotando-se uma de duas diferentes intensidades (90 ou 100% de 15 RM). Um delineamento cross over balanceado foi utilizado para determinar a ordem das sessões. A sessão com 100% de 15 RM envolveu a realização de três séries até a fadiga muscular, ao passo que a sessão com 90% de 15 RM foi realizada em duas séries com 15 repetições e uma última até a fadiga muscular. O intervalo de recuperação entre as séries foi 120 segundos. O volume de treino obtido com 90% de 15 RM foi 22,5% superior (P < 0,01) ao volume da sessão realizada com 100% de 15 RM. A sustentabilidade das repetições no exercício realizado a 100% de 15 RM foi comprometida nas duas séries finais da sessão (P < 0,01), com diferenças em relação ao protocolo realizado com menor intensidade. A análise dos resultados sugere que reduções de 10% da carga de 15 RM têm efeito significativo na sustentabilidade do número de repetições entre as séries e volume de treino de idosas treinadas quando comparadas ao exercício realizado a 100% de 15 RM.
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Caldana, Wanda Chiyoko Iwakami, Rozana Mesquita Ciconelli, Yara Juliano i Artur da Rocha Corrêa Fernandes. "A ressonância magnética do quadril na avaliação de pacientes com artrite reumatóide: estudo descritivo". Radiologia Brasileira 38, nr 4 (sierpień 2005): 255–60. http://dx.doi.org/10.1590/s0100-39842005000400005.
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OBJETIVO: Avaliar o valor da ressonância magnética (RM) como modalidade diagnóstica de imagem em pacientes com artrite reumatóide e estimar a freqüência das alterações no quadril em pacientes sintomáticos e assintomáticos. MATERIAIS E MÉTODOS: Foram avaliados 40 pacientes (17 sintomáticos e 23 assintomáticos) em equipamento de RM com 1,5 T, com o uso do contraste endovenoso. Os achados de RM foram subdivididos em alterações inflamatórias, degenerativas, mistas (inflamatórias e degenerativas) e extra-articulares. RESULTADOS: As alterações mais freqüentes na RM de quadril dos pacientes sintomáticos e assintomáticos foram dos tipos degenerativas (22,5%) e extra-articulares (22,5%). Apenas cinco dos pacientes sintomáticos apresentaram achados inflamatórios (12,5%), sendo quatro (10%) com alterações degenerativas associadas (alterações mistas). CONCLUSÃO: O estudo permitiu avaliar as principais alterações encontradas em pacientes portadores de artrite reumatóide pela RM. As alterações mais freqüentes na RM do quadril desses pacientes foram dos tipos degenerativas e extra-articulares (22,5% de cada grupo). Apenas cinco dos pacientes sintomáticos apresentaram achados inflamatórios (12,5%), sendo quatro (10%) com alterações degenerativas associadas.
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Santos, Marcel Koenigkam, Jorge Elias Júnior, Fernando Marum Mauad, Valdair Francisco Muglia i Clóvis Simão Trad. "Ressonância magnética do tórax: aplicações tradicionais e novas, com ênfase em pneumologia". Jornal Brasileiro de Pneumologia 37, nr 2 (kwiecień 2011): 242–58. http://dx.doi.org/10.1590/s1806-37132011000200016.
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O objetivo deste estudo de revisão foi apresentar as principais aplicações da ressonância magnética (RM) no estudo do tórax, incluindo a descrição de novas técnicas. Na ultima década, esse método teve grande evolução, com novos equipamentos, incluindo a interconexão simultânea de bobinas e a movimentação da mesa simultaneamente à aquisição das imagens, além do advento de novas técnicas rápidas de aquisição de imagem, tais como imagem paralela e aquisição parcial de dados, com ou sem utilização de apneia, somando-se ainda a introdução de novos agentes de contraste. Todos esses avanços fizeram com que a RM tenha ganhado espaço no estudo de diferentes patologias do tórax, incluindo as doenças pulmonares. Atualmente, a RM pode ser considerada a modalidade de escolha para a avaliação das lesões mediastinais, da parede torácica e dos tumores do sulco superior, mas também pode auxiliar no diagnóstico de doenças pulmonares, pleurais, cardíacas e da vasculatura pulmonar. A angiografia pulmonar por RM pode ser utilizada na avaliação de várias doenças vasculares pulmonares, e seu papel no estudo do tromboembolismo vem crescendo. A RM cardíaca, devido à possibilidade de avaliação morfológica e funcional em um mesmo exame, também já faz parte da rotina clínica na investigação de muitas patologias cardíacas. Por fim, o papel da RM vem sendo ampliado para a identificação e caracterização de nódulos pulmonares, avaliação das doenças das vias aéreas e caracterização dos derrames pleurais.
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Kim, Young Hoon, Sang Soo Shin, Lauren M. B. Burke, Chang Hee Lee, Young Mi Ku, Busakorn Vachiranubhap i Richard C. Semelka. "Hemangioma hepático subcapsular com realce perilesional: achados de RM". Radiologia Brasileira 43, nr 6 (grudzień 2010): 384–88. http://dx.doi.org/10.1590/s0100-39842010000600010.
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OBJETIVO: Descrever os achados de imagem de RM no hemangioma hepático com realce perilesional. MATERIAIS E MÉTODOS: Realizou-se uma pesquisa no banco de dados da unidade de RM para identificar todos os casos de hemangioma hepático com realce perilesional entre março de 2008 e julho de 2009. Todos os pacientes foram submetidos a RM pré-contraste em imagens ponderadas em T1 e T2 e em imagens dinâmicas após injeção de gadolínio. Características do hemangioma e do realce perilesional foram avaliadas nas imagens de RM. RESULTADOS: Sete hemangiomas em sete pacientes (cinco homens, duas mulheres; faixa etária entre 41-69 anos; média de 57 anos) foram incluídos no presente estudo. O tamanho das lesões variou de 7 a 20 mm (média de 12,4 mm). Na fase dominante arterial hepática, todos os sete hemangiomas mostraram realce perilesional cuneiforme que se atenuou nas imagens dois minutos após injeção de gadolínio. Quatro dessas lesões demonstraram realce capsular adjacente. CONCLUSÃO: Todos os hemangiomas hepáticos com realce perilesional eram lesões capsulares medindo menos que 2 cm. Tal localização sugere que esses hemangiomas podem recrutar vasos capsulares responsáveis pelo realce perilesional
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Fleischer, Soraya, i Silvana Nascimento. "Com Silvana Nascimento". Revista Mundaú, nr 3 (27.03.2018): 202–12. http://dx.doi.org/10.28998/rm.2017.n.3.4030.
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Entrevista com Silvana Nascimento, professora de Antropologia da Universidade de São Paulo, realizada por Soraya Fleischer, professora de Antropologia da Universidade de Brasília, e transcrita por Gabriela Crespo, graduanda em Ciências Sociais na UnB.
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Zárate, Néstor A. Heredia, Maria do Carmo Vieira i Fernanda Moreno Martins. "Produção de massa fresca dos inhames 'Cem/Um' e 'Macaquinho', em três densidades de plantas". Horticultura Brasileira 21, nr 1 (marzec 2003): 119–22. http://dx.doi.org/10.1590/s0102-05362003000100025.
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O trabalho foi conduzido na área experimental da UFMS, em Dourados (MS), de 24 de setembro de 1999 a 21 de maio de 2000, em Latossolo Vermelho distroférrico de textura argilosa. Avaliaram-se as produções de massa fresca dos inhames 'Cem/Um' e 'Macaquinho', cultivados sob três populações (100.000; 125.000 e 150.000 plantas.ha-1). O delineamento experimental foi de blocos casualizados, com quatro repetições e os tratamentos distribuídos num esquema fatorial 2 x 3. Foram efetuadas colheitas aos 217 e 240 dias após o plantio (DAP). Avaliou-se as massas frescas de limbos, pecíolos, rizomas-mães (RM) e de rizomas-filhos (RF). As produções de pecíolos na colheita aos 217 DAP tiveram aumento significativo de 2,2 t.ha-1 para o clone Macaquinho, em relação ao 'Cem/Um'; de 2,0 t.ha-1 na população de 125.000 plantas.ha-1, em relação a 100.000 plantas.ha-1. Na colheita aos 240 DAP houve efeito da interação. As produções de massa fresca de RM das plantas nas populações de 125.000 e 150.000 plantas.ha-1, colhendo-se aos 217 DAP, foram significativamente maiores em 3,0 e 1,9 t.ha-1, respectivamente, em relação à população de 100.000 plantas.ha-1. As produções de massa fresca dos RF aos 217 DAP mostraram que o 'Cem/Um' foi significativamente maior em 6,4 t.ha-1 que o 'Macaquinho'. Na colheita aos 240 DAP, as maiores produções do inhame 'Cem/Um', tanto de RM (11,4 t.ha-1) como de RF (56,7 t.ha-1), foram na população de 125.000 plantas.ha-1 e do 'Macaquinho' com 150.000 plantas.ha-1 (10,2 t.ha-1 de RM e 58,00 t.ha-1 de RF).
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Ximenes Filho, João Aragão, i Marcelo Gurgel Carlos da Silva. "Residência médica em otorrinolaringologia no Ceará em 2003: oferta de vagas e perfil da concorrência". Revista Brasileira de Otorrinolaringologia 72, nr 6 (grudzień 2006): 826–30. http://dx.doi.org/10.1590/s0034-72992006000600015.
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OBJETIVO: Avaliar e comparar a oferta de vagas de Residência Médica (RM) em Otorrinolaringologia no Ceará em 2003 e o perfil dos candidatos. FORMA DO ESTUDO: Corte transversal. MATERIAL E MÉTODOS: Os dados sobre os programas de RM foram obtidos por acesso ao endereço eletrônico da Comissão Nacional de Residência Médica (CNRM) e espelha a situação dos programas cadastrados em setembro de 2003. As características dos candidatos foram levantadas das instituições promotoras dos concursos para RM em 2003, complementada por buscas junto aos Conselhos Profissionais. RESULTADOS: Das 14 instituições com RM, apenas duas oferecem programa em Otorrinolaringologia: Hospital Universitário Walter Cantídio (HUWC) e Hospital Geral de Fortaleza (HGF). O total de vagas autorizado pela CNRM em Otorrinolaringologia nos dois programas é 12. Nove (75,00%) do total e 4 de R1 (100,00%) estão preenchidas. A taxa de ocupação por hospital é: HGF (66,67%) e HUWC (83,33%). A concorrência por vaga na RM de Otorrinolaringologia foi 13,0, sendo igualmente 8,0 no HUWC e no HGF. As 52 inscrições somadas dos dois hospitais provinham de 32 médicos, sendo 62,5% homens. As instituições universitárias que mais contribuíram foram as universidades federais do Ceará (62,50%), da Paraíba (15,63%) e de Alagoas (9,38%). Cerca de 41% eram recém-graduados de 2002. CONCLUSÃO: Este trabalho permitiu ajudar a traçar o perfil da Residência Médica em Otorrinolaringologia no Ceará.
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Urban, Cícero de Andrade, Élcio Juliato Piovesan, Sérgio Monteiro de Almeida, Pedro André Kowacs, Guilberto Minguetti i Lineu César Werneck. "Esquistossomose aguda com comprometimento cerebral: relato de caso". Arquivos de Neuro-Psiquiatria 54, nr 4 (grudzień 1996): 677–82. http://dx.doi.org/10.1590/s0004-282x1996000400021.
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É relatado um caso de esquistossomose na fase aguda com comprometimento cerebral precoce, síndrome piramidal nos membros inferiores, líquido cefalorraquidiano (LCR) normal e lesões com padrão desmielinizante na ressonância magnética (RM) encefálica. O diagnóstico foi comprovado através da imunofluorescência indireta para esquistossomose no LCR. O envolvimento encefálico pelo Schistosoma mansoni é menos frequente do que o medular e a resposta ao tratamento com o praziquantel e a prednisolona foi eficaz neste caso. São poucos os relatos de neuroesquistossomose encefálica. Devido a esse fato sua fisiopatologia e terapêutica necessitam de melhores estudos. Os aspectos imunológicos e apresentação na RM foram enfatizados.
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Calderon, Patrícia dos Santos, Kátia Rodrigues Reis, Carlos dos Reis Pereira Araújo, José Henrique Rubo i Paulo César Rodrigues Conti. "[NO TITLE AVAILABLE]". Revista Dental Press de Ortodontia e Ortopedia Facial 13, nr 2 (kwiecień 2008): 34–39. http://dx.doi.org/10.1590/s1415-54192008000200005.
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OBJETIVO: esta revisão de literatura visa avaliar, através de literatura específica, a sensibilidade e especificidade do exame de ressonância magnética (RM) para o diagnóstico dos desarranjos internos da articulação temporomandibular (ATM). METODOLOGIA: tanto artigos que utilizaram ATM de cadáveres para comparar achados anatômicos aos achados de ressonância magnética (RM), como artigos que compararam achados clínicos com achados de RM foram utilizados. Através dos achados desses artigos, as propriedades de sensibilidade e especificidade da RM para o diagnóstico de desarranjos internos da ATM foram calculadas. Com isso, a confiabilidade e a aplicabilidade do exame de RM no diagnóstico dos desarranjos internos da ATM foram discutidas. RESULTADOS: encontrou-se sensibilidade de 90% e especificidade de 88% da RM para desarranjos internos da ATM. CONCLUSÃO: o exame de RM de ATM possui ótima sensibilidade e especificidade para o diagnóstico dos desarranjos internos da ATM. Porém, tal exame deve ser solicitado com cautela, apenas nos casos onde a imagem seja indispensável para o plano de tratamento.
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De Melo Carvalho Filho, Aderval, Almira Alves dos Santos i Rozangela Maria de Almeida Fernandes Wyszomirska. "Elaboração de um guia/tutorial com orientações didático-pedagógicas para preceptores de residência médica: relato de experiência". Conjecturas 22, nr 17 (29.12.2022): 892–905. http://dx.doi.org/10.53660/conj-2233-2w54.
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Introdução: A Residência Médica e a preceptoria possuem um papel importante na formação do médico especialista no Brasil. Os produtos educacionais, como os Guias/Tutoriais, objetivam informar e transmitir conhecimentos ao seu público-alvo. Relato de experiência: O Guia/Tutorial objetiva contribuir com a melhoria da capacitação pedagógica dos preceptores de RM em uma capital do Nordeste brasileiro. Utilizando o Método CTM3, objetiva otimizar a comunicação trazendo informações sobre atividade didática, metodologias ativas de ensino na RM, processo avaliativo na RM, entre outros temas. Discussão: O preceptor, em geral, dispõe de pouco tempo livre para a realização de capacitações, e os cursos de curta duração podem auxiliar neste desafio. Os produtos educacionais promovem vantagens para o aprendizado, possibilitando ao professor melhorias da prática diária. Este Guia tem o potencial de contribuir para a capacitação pedagógica de preceptores da RM, pela disponibilização de informações sobre preceptoria por meio da adição de elementos multimídia. Conclusão: Este produto oferece subsídios para a capacitação pedagógica dos preceptores de RM, por meio de fácil acesso, dotado de conteúdo conciso.
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Nacif, Marcelo Souto, Gustavo Federico Jauregui, Ricardo Andrade Fernandes de Mello, Márcia Heizer, Carolina Benvegnu Nahime i Alair Augusto Sarmet Moreira Damas dos Santos. "Linfoma adrenal primário bilateral com envolvimento do sistema nervoso central: relato de caso". Radiologia Brasileira 38, nr 3 (czerwiec 2005): 235–38. http://dx.doi.org/10.1590/s0100-39842005000300014.
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Os autores demonstram os principais achados do linfoma adrenal primário nas tomografias computadorizadas (TC) de abdome e crânio e na ressonância magnética (RM) do crânio, apresentando um caso raro de um paciente do sexo masculino, 72 anos de idade, com progressiva deterioração do estado mental, evoluindo, num período de dois meses, com perda da memória recente, desorientação e, finalmente, franco quadro demencial. O paciente foi submetido a investigação por métodos de imagem com TC de crânio (sem administração venosa de contraste iodado), tórax e abdome (sem e com administração venosa de contraste iodado), e RM de crânio (antes e após a administração venosa de gadolínio). Na TC de crânio observaram-se áreas nodulares levemente hiperdensas, adjacentes aos ventrículos laterais. A TC de tórax não mostrou alterações relevantes. Na TC do abdome foram demonstrados nódulos sólidos em ambas as adrenais. A RM de crânio evidenciou impregnação difusa e nodular do epêndima do IV ventrículo, III ventrículo, cornos anteriores e temporais, átrios e corpo dos ventrículos laterais. O diagnóstico definitivo foi realizado através do estudo imuno-histoquímico da peça após biópsia da adrenal. Os autores concluíram, após revisão atualizada da literatura, que a TC e a RM são métodos essenciais na detecção e melhor avaliação de linfomas adrenais primários, principalmente quando associados a envolvimento do sistema nervoso central, e a RM mostra-se mais sensível para a detecção de lesões extracerebrais nos espaços epidural e subdural, principalmente após a administração venosa de gadolínio.
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Bernardes, Renata Junqueira Moll, Edson Marchiori, Paulo Manuel de Barros Bernardes, Maria Beatriz Albano Monzo Gonzaga i Luiz Carlos Simões. "Avaliação pré e pós-operatória da tetralogia de Fallot por ressonância magnética". Radiologia Brasileira 37, nr 4 (sierpień 2004): 251–60. http://dx.doi.org/10.1590/s0100-39842004000400007.
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A proposta deste trabalho foi estudar, prospectivamente, por ressonância magnética (RM), pacientes com diagnóstico de tetralogia de Fallot e avaliar a validade da RM como exame pré e pós-operatório nesses pacientes. Foram estudados, através de seqüências spin-eco e angiografia por RM (angio-RM) com utilização de gadolínio, 20 pacientes com idades entre 1 e 29 anos. Onze pacientes apresentavam a forma clássica da tetralogia de Fallot e nove, a forma extrema (tetralogia de Fallot com atresia pulmonar). O estudo permitiu a avaliação adequada da aorta, possibilitando a análise quanto à presença ou não de dilatação e quanto à posição do arco aórtico em todos os casos. Houve também uma excelente visualização das artérias pulmonares principal, direita e esquerda, possibilitando a avaliação qualitativa quanto à presença de dilatação, hipoplasia, estenose, ou quanto à ausência do vaso. Os resultados obtidos indicam que a RM, incluindo técnicas de angio-RM com meio de contraste, é um método de grande utilidade no estudo pré e pós-operatório de pacientes com tetralogia de Fallot, porque permite a obtenção de informações anatômicas importantes e complementares à ecocardiografia, podendo ser considerada uma alternativa ao cateterismo cardíaco, principalmente na avaliação da anatomia vascular pulmonar.
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Stern, Jonathan, Amiel Sternberg, Claude-André Faucher-Giguère, Zachary Hafen, Drummond Fielding, Eliot Quataert, Andrew Wetzel i in. "Neutral CGM as damped Ly α absorbers at high redshift". Monthly Notices of the Royal Astronomical Society 507, nr 2 (20.08.2021): 2869–84. http://dx.doi.org/10.1093/mnras/stab2240.
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ABSTRACT Recent searches for the hosts of z ∼ 4 damped Ly α absorbers (DLAs) have detected bright galaxies at distances of tens of kpc from the DLA. Using the FIRE-2 cosmological zoom simulations, we argue that these relatively large distances are due to a predominantly cool and neutral inner circumgalactic medium (CGM) surrounding high-redshift galaxies. The inner CGM is cool because of the short cooling time of hot gas in ${\lesssim}10^{12}\, {\rm M_{\odot }}$ haloes, which implies that accretion and feedback energy are radiated quickly, while it is neutral due to high volume densities and column densities at high redshift that shield cool gas from photoionization. Our analysis predicts large DLA covering factors (${\gtrsim}50{{\ \rm per\ cent}}$) out to impact parameters ∼0.3[(1 + z)/5]3/2Rvir from the central galaxies at z ≳ 1, equivalent to a proper distance of ${\sim}21\, M_{12}^{1/3} \left(\left(1+z\right)/5\right)^{1/2}\, {\rm kpc}$ (Rvir and M12 are the halo virial radius and mass in units of $10^{12}\, {\rm M_{\odot }}$, respectively). This implies that DLA covering factors at z ∼ 4 may be comparable to unity out to a distance ∼10 times larger than stellar half-mass radii. A predominantly neutral inner CGM in the early universe suggests that its mass and metallicity can be directly constrained by absorption surveys, without resorting to the large ionization corrections as required for ionized CGM.
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Jaques, Cristina Saade, Lara Maria Miranda de Gouvêa, José Lucas Batista Júnior, Charbel Jacob Junior, Igor Machado Cardoso, Adroaldo Nobrega Fonseca, Rafael Burgomeister Lourenço i Rodrigo Rezende. "Análise comparativa da avaliação da lordose lombar aferida na radiografia em ortostase e na ressonância magnética". Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery 33, nr 04 (grudzień 2014): 275–78. http://dx.doi.org/10.1055/s-0038-1626226.
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Resumo Objetivo: Comparar os ângulos encontrados na radiografia em ortostase e na ressonância magnética (RM) em decúbito dorsal com coxim sobre os membros inferiores. Métodos: Estudo prospectivo, de caráter descritivo, no qual se avaliou uma amostra de 100 pacientes, sendo 51 do sexo masculino, em que o grau de lordose lombar foi aferido por três examinadores independentes por meio da radiografia em ortostase e da RM em decúbito, com coxim, nos níveis de L1 a L5, de acordo com o método de Cobb. Resultados: A média dos valores encontrados na radiografia e na RM com coxim de L1 a L5 foi de 42,2° e 31,5°, respectivamente (p < 0,001), demonstrando que a angulação da lordose lombar aferida na RM subdimensiona a verdadeira angulação em 25%. Conclusão: A RM é insuficiente para a avaliação da lordose lombar, sendo de extrema importância a avaliação radiológica para avaliar a verdadeira angulação da lordose lombar.
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Herédia, Vasco, Ersan Altun, Miguel Ramalho, Rafael De Campos, Rafael Azevedo, Ertan Pamuklar i Richard C. Semelka. "Ressonância Magnética em Doentes Grávidas com Suspeita de Embolia Pulmonar: Steady-State Free Precession vs 3D-GRE Após Gadolínio". Acta Médica Portuguesa 25, nr 6 (28.01.2013): 359–67. http://dx.doi.org/10.20344/amp.1352.
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Introdução: A embolia pulmonar é uma importante causa de mortalidade materna no mundo desenvolvido. A cintigrafia de ventilaçãoperfusãoe a tomografia computorizada causam exposição à radiação ionizante. A ressonância magnética com contraste-gadolínioendovenoso não é geralmente indicada em doentes grávidas. A RM utilizando técnicas resistentes aos artefactos de movimento, quenão usam contraste endovenoso, como a balanced steady-state free precession (SSFP) poderá ser uma abordagem preferível emdoentes grávidas.Objectivo: Descrever os achados preliminares do uso de SSFP na avaliação de doentes grávidas com suspeita de EP, comparandocom uma população de jovens mulheres avaliadas com RM 3D-gradiente eco após contraste-gadolínio pela mesma suspeita clínica.Materiais e Métodos: O arquivo radiológico foi retrospectivamente analisado para dois grupos de doentes submetidos a RM do tóraxem 1.5T por suspeita de EP, entre Janeiro de 2007 e Junho de 2010: grávidas com RM incluindo SSFP (grupo A) e mulheres comidade inferior a 45 anos com RM incluindo sequência ponderada em T1, 3D-GRE, após contraste-gadolínio (grupo B). A populaçãofinal incluiu 21 doentes. As imagens de RM foram avaliadas com leitura independente e cega, para qualidade de imagem do sistemaarterial pulmonar, EP e outros achados torácicos. Os dados foram submetidos a análise estatística.Resultados: A qualidade de imagem foi considerada boa em todas as artérias centrais e lobares de ambos os grupos e em pelo menos90% (grupo A) e 83,3% (grupo B) das artérias segmentares. Não ocorreram diferenças significativas na qualidade de imagem dasartérias pulmonares centrais e lobares entre os grupos A e B (p > 0,05).Conclusão: A RM com SSFP pode visualizar as artérias pulmonares centrais, lobares e segmentares em doentes grávidas, comqualidade de imagem adequada e comparável a 3D-GRE.
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Leopoldino, Denise de Deus, Giuseppe D'Ippolito, Alexandre Sérgio de Araújo Bezerra i Tatiana Schiller Gracio. "Aspectos técnicos da ressonância magnética de mama com meio de contraste: revisão da literatura". Radiologia Brasileira 38, nr 4 (sierpień 2005): 287–94. http://dx.doi.org/10.1590/s0100-39842005000400011.
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Com a difusão do uso de meios de contraste, avanços na tecnologia das bobinas de superfície e desenvolvimento de protocolos rápidos de aquisição de imagens, a ressonância magnética (RM) de mama com meio de contraste tem-se mostrado importante modalidade na detecção, diagnóstico e estadiamento do câncer de mama. Apesar desses avanços, existem alguns pontos não consensuais no que diz respeito aos aspectos técnicos e critérios de interpretação de imagem da RM contrastada de mama. Neste artigo fazemos revisão bibliográfica dos parâmetros de interpretação de imagens e aspectos técnicos da RM de mama, incluindo considerações sobre a "performance" do equipamento, bobinas de radiofreqüência dedicadas, modo de utilização de contraste paramagnético, técnicas de supressão de gordura, planos de aquisição, seqüências de pulso e fontes de artefato.
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Kosugi, Eduardo M., Rodrigo P. Tangerina, Gabriel C. Dib, Hugo V. L. Ramos i Norma O. Penido. "Schwanoma vestibular como causa de surdez súbita". Revista Brasileira de Otorrinolaringologia 70, nr 6 (grudzień 2004): 795–99. http://dx.doi.org/10.1590/s0034-72992004000600015.
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A Surdez Súbita (SS) é um sintoma causado por mais de 60 doenças diferentes, dentre elas, o Schwanoma Vestibular (SV). Shaia & Sheehy (1976) apresentaram uma incidência de 1% de SV em 1220 casos de SS. Não há características específicas para o diagnóstico do SV, sendo a ressonância magnética (RM) o exame de escolha. OBJETIVO: Verificar a real incidência de SV em casuísticas de SS com a realização de RM. FORMA DE ESTUDO: Coorte transversal. MATERIAL E MÉTODO: Estudo prospectivo com a realização de RM com contraste de gadolínio em todos os pacientes com SS do serviço de urgência em Otorrinolaringologia do Hospital São Paulo no período de abril de 2001 a maio de 2003. RESULTADOS: Foram realizados exames de RM em 49 pacientes que apresentaram SS, sendo diagnosticados 3 (6,1%) casos de SV. CONCLUSÃO: A incidência real de SV em casuísticas de SS pode ser maior do que o classicamente descrito na literatura, devido ao subdiagnóstico pela não-utilização da RM de rotina nestes casos.
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Zam, Alexandre de Oliveira, Priscila Rossi de Batista, Diogo Miranda Barbosa, Jose Lucas Batista Junior, Charbel Jacob Junior, Igor Cardoso Machado i Rodrigo Rezende. "Comparação do Índice de Torg obtido por meio de radiografia e ressonância magnética nos pacientes com mielopatia cervical espondilótica". Coluna/Columna 11, nr 1 (2012): 66–69. http://dx.doi.org/10.1590/s1808-18512012000100012.
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OBJETIVO: A Mielopatia Cervical Espondilótica (MCE) é uma disfunção da medula espinhal relacionada à degeneração típica do envelhecimento. No estudo de imagem podemos obter a medida do Índice de Torg, para estimar a estenose cervical. Objetivamos, assim, medir o Índice de Torg através de radiografia e ressonância magnética (RM), possibilitando verificar possíveis discrepâncias entre os métodos de medida. MÉTODOS: Realizada mensuração do Índice de Torg na radiografia e na RM da coluna cervical, sendo obtido através da relação entre a superfície posterior do corpo vertebral e o ponto mais próximo à linha laminar correspondente, dividido pelo diâmetro sagital do corpo vertebral. RESULTADOS: Participaram 29 pacientes, sendo 10 mulheres e 19 homens, com médias de idade 48,1 ± 11 anos, de peso 68,7 ± 5 Kg e de altura 1,68 ± 0,6 m. Houve diferença significativa entre o Índice de Torg calculado através de radiografia e RM, sendo menores os índices observados na RM (radiografia: 0,73 ± 0,17 vs. RM: 0,48 ± 0,14, p< 0,05). No entanto, ambas as aferições traduzem o mesmo resultado: estenose cervical absoluta (Índice de Torg < 0,8). CONCLUSÕES: Nossos resultados corroboram relatos de outros autores que acreditam que o Índice de Torg medido através da radiografia, como preconizado, minimiza a real estenose do canal cervical. Sugerimos em nosso estudo que a RM permite melhor estimativa do grau de estenose do canal, muito embora nossos resultados em relação ao grau de estenose cervical tenham sido semelhantes estatisticamente.