Articoli di riviste: "IVR"

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Kanazawa, Susumu. "IVR". Okayama Igakkai Zasshi (Journal of Okayama Medical Association) 125, n. 3 (2013): 263–65. http://dx.doi.org/10.4044/joma.125.263.

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Xu, Jingao, Hengjie Chen, Kun Qian, Erqun Dong, Min Sun, Chenshu Wu, Li Zhang e Zheng Yang. "iVR". Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 3, n. 3 (9 settembre 2019): 1–22. http://dx.doi.org/10.1145/3351272.

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OGAWA, KIYOSHI, e YOSHITOMO SANO. "IVR Techniques". Japanese Journal of Radiological Technology 52, n. 6 (1996): 778–79. http://dx.doi.org/10.6009/jjrt.kj00001354456.

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Menzer, Christian, Adriana Rendon e Jessica C. Hassel. "Treatment of Indolent Cutaneous B-Cell Lymphoma with Intralesional or Intravenous Rituximab". Cancers 14, n. 19 (30 settembre 2022): 4787. http://dx.doi.org/10.3390/cancers14194787.

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Indolent cutaneous B-cell lymphomas (CBCL) are a rare disease for which the therapeutic recommendations are based on clinical reports. Recommendations for solitary lesions include surgery or irradiation. However, the high relapse rates may require less invasive repeatable therapy. This study seeks to retrospectively assess the efficacy of intralesional rituximab (ILR) for indolent CBCL when compared with intravenous rituximab (IVR). Patients treated for indolent CBCL with ILR or IVR at the Division of DermatoOncology of the University Hospital Heidelberg were eligible for this study. Characteristics of lymphoma, treatment response, and adverse events were assessed. Twenty-one patients, 67% male at a median age of 52 (range 17–80), were included. Nineteen (90%) had only localized lymphoma (stage T1 and T2). Complete response was achieved in 92% (11/12) of ILR after a median of one cycle (three injections) and 78% (7/8) of IVR patients after a median of six cycles. Half of ILR patients and 78% of IVR patients showed relapse after a median of 15 and 23 months, respectively. Adverse reactions were usually mild and were limited to the first injection of ILR. One patient with IVR contracted a pulmonary infection. ILR may be an alternative to the intravenous administration of rituximab for localized indolent CBCL.

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Takahashi, Motoichiro. "IVR and Serendipity". Japanese Journal of Phlebology 26, n. 1 (2015): i—ii. http://dx.doi.org/10.7134/phlebol.26_1i.

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Moffett, Brady S., Lindsay Schmees, Kristina Gutierrez, Christian Erikson, Andrew Chu, Jorge A. Coss-Bu e Nathan Strobel. "Evaluation of Intravenous Ranitidine on Gastric pH in Critically Ill Pediatric Patients". Journal of Pediatric Pharmacology and Therapeutics 24, n. 6 (1 novembre 2019): 504–9. http://dx.doi.org/10.5863/1551-6776-24.6.504.

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OBJECTIVE To determine the dosing regimen of intravenous ranitidine (IVR) most likely to achieve a gastric pH of ≥4 in critically ill pediatric patients. METHODS A retrospective cohort study was designed and included patients younger than 19 years with gastric pH samples taken from a nasogastric tube within 24 hours after a dose of IVR in an intensive care unit. Data collection included patient demographics, clinical variables, IVR dosing, and gastric pH samples. Descriptive statistical analysis and multivariable logistic regression analysis with clustering of patients was performed to determine variables associated with odds of obtaining a pH of ≥4. RESULTS A total of 628 patients (1356 nasogastric samples) met study criteria (median age 1.3 years [IQR, 0.33, 5.7 years]; 53% male). The IVR dose was 0.90 ± 0.30 mg/kg per dose every 8.1 ± 2.9 hours, and 60.9% of patients (n = 383) had a pH ≥4. Patients with a pH value ≥4 had gastric pH samples taken earlier after a dose of IVR (6.7 ± 5.0 vs. 5.9 ± 4.7 hours, p < 0.001) but had no difference in IVR dose per kilogram (0.88 ± 0.31 vs. 0.88 ± 0.26, p = 0.86) or frequency of dosing (7.9 ± 3.2 vs. 7.9 ± 3.2 hours, p = 0.89). A multivariable logistic regression model identified increasing age, decreased kidney function, and decreased time to pH sample after an IVR dose with significantly greater odds of pH ≥4. CONCLUSIONS The IVR dosing to maintain a gastric pH ≥4 in critically ill pediatric patients should occur more frequently than every 8 hours. Gastric pH evaluation may be necessary to assess IVR efficacy.

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HORI, YOJI. "3. Ultrasonography in IVR". Japanese Journal of Radiological Technology 52, n. 6 (1996): 784–88. http://dx.doi.org/10.6009/jjrt.kj00001354459.

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Pollak, Eli, e Salvador Miret-Artés. "Thawed semiclassical IVR propagators". Journal of Physics A: Mathematical and General 37, n. 41 (30 settembre 2004): 9669–76. http://dx.doi.org/10.1088/0305-4470/37/41/005.

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Carlson, Nora V., E. McKenna Kelly e Iain Couzin. "Individual vocal recognition across taxa: a review of the literature and a look into the future". Philosophical Transactions of the Royal Society B: Biological Sciences 375, n. 1802 (18 maggio 2020): 20190479. http://dx.doi.org/10.1098/rstb.2019.0479.

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Individual vocal recognition (IVR) has been well studied in mammals and birds. These studies have primarily delved into understanding IVR in specific limited contexts (e.g. parent–offspring and mate recognition) where individuals discriminate one individual from all others. However, little research has examined IVR in more socially demanding circumstances, such as when an individual discriminates all individuals in their social or familial group apart. In this review, we describe what IVR is and suggest splitting studies of IVR into two general types based on what questions they answer (IVR-singular, and IVR-multiple). We explain how we currently test for IVR, and many of the benefits and drawbacks of different methods. We address why IVR is so prevalent in the animal kingdom, and the circumstances in which it is often found. Finally, we explain current weaknesses in IVR research including temporality, specificity, and taxonomic bias, and testing paradigms, and provide some solutions to address these weaknesses. This article is part of the theme issue ‘Signal detection theory in recognition systems: from evolving models to experimental tests’.

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Figueira, João, Rufino Silva, José Henriques, Paulo Caldeira Rosa, Inês Laíns, Pedro Melo, Sandrina Gonçalves Nunes e José Cunha-Vaz. "Ranibizumab for High-Risk Proliferative Diabetic Retinopathy: An Exploratory Randomized Controlled Trial". Ophthalmologica 235, n. 1 (3 dicembre 2015): 34–41. http://dx.doi.org/10.1159/000442026.

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Purpose: To compare the efficacy and safety of intravitreal ranibizumab (IVR) in monotherapy or associated with panretinal photocoagulation (PRP) versus conventional PRP, for high-risk proliferative diabetic retinopathy (PDR) without vitreoretinal traction. Procedures: Multicenter randomized trial, with 3 treatment arms: PRP versus IVR alone and PRP + IVR combined treatment. Follow-up was performed at months 3, 6 and 12. Results: Thirty-five subjects were randomized and 32 used for analysis. Complete regression of neovessels elsewhere occurred in 100% (PRP + IVR), 75% (IVR) and 69.2% (PRP) and for neovessels of the disk in 44.4% (PRP + IVR), 37.5% (IVR) and 30.8% (PRP). During the 1-year duration of treatment, there was no need for laser rescue treatment in IVR-treated eyes. Conclusions: This trial suggests that the use of IVR is safe and may have a beneficial effect in the treatment of eyes with high-risk PDR. Message: Ranibizumab appears to have a place in the treatment of PDR.

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Ichida, Takao, Minoru Hosogai e Hiroaki Kudoh. "441 Navigation system For IVR". Japanese Journal of Radiological Technology 51, n. 10 (1995): 1511. http://dx.doi.org/10.6009/jjrt.kj00001353212.

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TAKAHASHI, MANABU. "2. IVR-CT/Angio System". Japanese Journal of Radiological Technology 52, n. 6 (1996): 782–84. http://dx.doi.org/10.6009/jjrt.kj00001354458.

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Colson, Vicki L. "IVR customer address acquisition method". Journal of the Acoustical Society of America 122, n. 2 (2007): 708. http://dx.doi.org/10.1121/1.2771358.

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Romeo, John Patrick. "IVR to SMS text messenger". Journal of the Acoustical Society of America 126, n. 4 (2009): 2141. http://dx.doi.org/10.1121/1.3238223.

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Patwari, G. N., e S. Wategaonkar. "Does inversion symmetry influence IVR?" Chemical Physics Letters 323, n. 5-6 (giugno 2000): 460–66. http://dx.doi.org/10.1016/s0009-2614(00)00565-0.

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Aramaki, Takeshi. "IVR-CT ─ Born and Raised ─". Japanese Journal of Radiological Technology 75, n. 12 (2019): 1460–63. http://dx.doi.org/10.6009/jjrt.2019_jsrt_75.12.1460.

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Shaw, William S., e Santosh K. Verma. "Data Equivalency of an Interactive Voice Response System for Home Assessment of Back Pain and Function". Pain Research and Management 12, n. 1 (2007): 23–30. http://dx.doi.org/10.1155/2007/185863.

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BACKGROUND: Interactive voice response (IVR) systems that collect survey data using automated, push-button telephone responses may be useful to monitor patients’ pain and function at home; however, its equivalency to other data collection methods has not been studied.OBJECTIVES: To study the data equivalency of IVR measurement of pain and function to live telephone interviewing.METHODS: In a prospective cohort study, 547 working adults (66% male) with acute back pain were recruited at an initial outpatient visit and completed telephone assessments one month later to track outcomes of pain, function, treatment helpfulness and return to work. An IVR system was introduced partway through the study (after the first 227 participants) to reduce the staff time necessary to contact participants by telephone during nonworking hours.RESULTS: Of 368 participants who were subsequently recruited and offered the IVR option, 131 (36%) used IVR, 189 (51%) were contacted by a telephone interviewer after no IVR attempt was made within five days, and 48 (13%) were lost to follow-up. Those with lower income were more likely to use IVR. Analysis of outcome measures showed that IVR respondents reported comparatively lower levels of function and less effective treatment, but not after controlling for differences due to the delay in reaching non-IVR users by telephone (mean: 35.4 versus 29.2 days).CONCLUSIONS: The results provided no evidence of information or selection bias associated with IVR use; however, IVR must be supplemented with other data collection options to maintain high response rates.

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Pradani, Winangsari. "Struktur Pesan pada Interactive Voice Response (IVR)". JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI 1, n. 1 (4 aprile 2011): 13. http://dx.doi.org/10.36722/sst.v1i1.13.

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Interactive Voice Response (IVR) is an automated telephony system that interacts with callers, gathers information and routes calls to the appropriate recipient. An IVR system (IVRS) accepts a combination of voice telephone input and touch-tone keypad selection and provides appropriate responses in the form of voice, fax, callback, e-mail and perhaps other media. In recent years, many enterprises use IVR as their customer service media. Some problems arise as user problems, that is user have to remembering the too many choices; user does’nt achieve what they want (did not find the right choices); and the worst is tiring finding choices yet they have not find the human operator. This paper will observe the effect of message structuring for IVR customer satisfication. Human information processing (especially audio-based information) theory as well as menu organizing theory will be used as analysis fundamentals. Questionnaire will be distributed to IVR users to grab the real user experience<strong>.</strong>

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Shimizu, Norihiro, Toshiyuki Oshitari, Tomoaki Tatsumi, Yoko Takatsuna, Miyuki Arai, Eiju Sato, Takayuki Baba e Shuichi Yamamoto. "Comparisons of Efficacy of Intravitreal Aflibercept and Ranibizumab in Eyes with Diabetic Macular Edema". BioMed Research International 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/1747108.

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We compared the efficacy of intravitreal aflibercept (IVA) to intravitreal ranibizumab (IVR) injections in eyes with diabetic macular edema (DME). The medical records of 49 eyes of 36 patients who were diagnosed with DME and had received IVR and 46 eyes of 40 patients who had received IVA treatment were reviewed. The central macular thickness (CMT) and best-corrected visual acuity (BCVA) were measured at the baseline and at 1, 3, and 6 months after the IVR or IVA. The mean number of injections of IVR was 2.6±1.1 and of IVA was 2.7±1.4. At 6 months, the CMT was significantly thinner than the baseline after IVR and after IVA. The mean BCVA was significantly better than the baseline after IVR only at 1 and 3 months and after IVA at 1 and 6 months. The BCVA of eyes with serous retinal detachment (SRD) was significantly better at 1 month after the IVR and at 1 month and 6 months after the IVA. The BCVAs improved more significantly in the SRD+ group than in the SRD− group. The effects of IVA persist longer than that of IVR. The effectiveness of both IVR and IVA was not dependent on the presence of SRD (IRB#2107).

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Sato, Toshimitsu, Yoichi Eguchi, Chika Yamazaki, Takanobu Hino, Toshikazu Saida e Koichi Chida. "Development of a New Radiation Shield for the Face and Neck of IVR Physicians". Bioengineering 9, n. 8 (29 luglio 2022): 354. http://dx.doi.org/10.3390/bioengineering9080354.

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Interventional radiology (IVR) procedures are associated with increased radiation exposure and injury risk. Furthermore, radiation eye injury (i.e., cataract) in IVR staff have also been reported. It is crucial to protect the eyes of IVR physicians from X-ray radiation exposure. Many IVR physicians use protective Pb eyeglasses to reduce occupational eye exposure. However, the shielding effects of Pb eyeglasses are inadequate. We developed a novel shield for the face (including eyes) of IVR physicians. The novel shield consists of a neck and face guard (0.25 mm Pb-equivalent rubber sheet, nonlead protective sheet). The face shield is positioned on the left side of the IVR physician. We assessed the shielding effects of the novel shield using a phantom in the IVR X-ray system; a radiophotoluminescence dosimeter was used to measure the radiation exposure. In this phantom study, the effectiveness of the novel device for protecting against radiation was greater than 80% in almost all measurement situations, including in terms of eye lens exposure. A large amount of scattered radiation reaches the left side of IVR physicians. The novel radiation shield effectively protects the left side of the physician from this scattered radiation. Thus, the device can be used to protect the face and eyes of IVR physicians from occupational radiation exposure. The novel device will be useful for protecting the face (including eyes) of IVR physicians from radiation, and thus could reduce the rate of radiation injury. Based on the positive results of this phantom study, we plan to perform a clinical experiment to further test the utility of this novel radiation shield for IVR physicians.

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Mulders, Miriam, Josef Buchner e Michael Kerres. "A Framework for the Use of Immersive Virtual Reality in Learning Environments". International Journal of Emerging Technologies in Learning (iJET) 15, n. 24 (22 dicembre 2020): 208. http://dx.doi.org/10.3991/ijet.v15i24.16615.

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Immersive Virtual Reality (iVR) technologies can enrich teaching and learning environments, but their use is often technology-driven and instructional con-cepts are missing. The design of iVR-technology-supported learning environ-ments should base on both, an evidence-based educational model as well as on features specific to iVR. Therefore, the article provides a framework for the use of iVR in learning environments based on the Cognitive Theory of Multi-media Learning (CTML). It outlines how iVR learning environments could and should be designed based on current knowledge from research on Multimedia Learning.

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Huber, Tobias, Markus Paschold, Christian Hansen, Hauke Lang e Werner Kneist. "Artificial Versus Video-Based Immersive Virtual Surroundings: Analysis of Performance and User’s Preference". Surgical Innovation 25, n. 3 (5 marzo 2018): 280–85. http://dx.doi.org/10.1177/1553350618761756.

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Introduction. Immersive virtual reality (VR) laparoscopy simulation connects VR simulation with head-mounted displays to increase presence during VR training. The goal of the present study was the comparison of 2 different surroundings according to performance and users’ preference. Methods. With a custom immersive virtual reality laparoscopy simulator, an artificially created VR operating room (AVR) and a highly immersive VR operating room (IVR) were compared. Participants (n = 30) performed 3 tasks (peg transfer, fine dissection, and cholecystectomy) in AVR and IVR in a crossover study design. Results. No overall difference in virtual laparoscopic performance was obtained when comparing results from AVR with IVR. Most participants preferred the IVR surrounding (n = 24). Experienced participants (n = 10) performed significantly better than novices (n = 10) in all tasks regardless of the surrounding ( P < .05). Participants with limited experience (n = 10) showed differing results. Presence, immersion, and exhilaration were significantly higher in IVR. Two thirds assumed that IVR would have a positive influence on their laparoscopic simulator use. Conclusion. This first study comparing AVR and IVR did not reveal differences in virtual laparoscopic performance. IVR is considered the more realistic surrounding and is therefore preferred by the participants.

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Araiza, Paola, Therese Keane, Won Sun Chen e Jordy Kaufman. "Children's memory of a story experienced with virtual reality versus traditional media technology". International Journal of Virtual Reality 20, n. 2 (25 dicembre 2020): 55–69. http://dx.doi.org/10.20870/ijvr.2020.20.2.3151.

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Immersive Virtual Reality Technology (IVR) is a visual multi-sensory computer-simulated environment that perceptually surrounds an individual, creating the illusion that one has “stepped inside” and is included in, and interacting with the generated world. Although IVR has been suggested as a tool to enhance learning, existing work has not examined how IVR presentations, compared with other types of storytelling, facilitate or interfere with children’s memory formation. Here, we present data from a study of seventy 6- and 7-year-old children randomly assigned to experience a story in one of three modalities: IVR, video, or a paper-based book. We assessed the children’s story recall and their ability to identify the protagonist’s emotions. Results showed that, overall, children in the IVR condition performed better in the memory-recall task than the children in the video and book conditions. The most pronounced difference in memory performance was between the IVR and book conditions. In the IVR versus video conditions, 6-year-olds performed significantly better in the IVR condition than in the video condition, while 7-year-olds performed similarly in both digital-story conditions. We found no effects of condition on children’s attribution of emotions to the story’s protagonist. We conclude that IVR may enhance children’s ability to learn story content in certain situations.

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Andersson, Claes. "Comparison of WEB and Interactive Voice Response (IVR) Methods for Delivering Brief Alcohol Interventions to Hazardous-Drinking University Students: A Randomized Controlled Trial". European Addiction Research 21, n. 5 (2015): 240–52. http://dx.doi.org/10.1159/000381017.

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This study evaluated automated techniques including personalized normative feedback and protective behavioral strategies, for brief interventions intended to reduce peak alcohol concentrations in university students. After completing baseline assessment, a total of 1,678 hazardous-drinking consumers were randomized to a single or a repeated Internet (WEB) or Interactive Voice Response (IVR) intervention, or to a control group (Single WEB: 323; Single IVR: 329; Repeated WEB: 318; Repeated IVR: 334; Control group: 374). At follow-up, six weeks after baseline, questionnaires were returned by 1,422 participants (Single WEB: 277; Single IVR: 286; Repeated WEB: 259; Repeated IVR: 279; Control group: 321). It was found that peak estimated BAC was reduced in the total group (b -0.14, 95% confidence interval (CI) -0.023; -0.005), in the total (b -0.17, 95% CI -0.027; -0.007) and single (b -0.021, 95% CI -0.032; -0.011) WEB group, and in the total (b -0.011, 95% CI -0.021; -0.015) and repeated (b -0.012, 95% CI -0.023; -0.000) IVR groups, compared to controls. The reduction in peak estimated BAC was greater in the single WEB group compared to the single IVR group (b -0.011, 95% CI -0.022; -0.000). This study concluded that both WEB and IVR interventions have a small but significant effect in reducing heavy episodic drinking, which may be due to the relatively large sample size. Repeated intervention may be needed if delivered by IVR.

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Ellway, Benjamin P. W. "What’s wrong with IVR system service? A spatial theorisation of customer confusion and frustration". Journal of Service Theory and Practice 26, n. 4 (11 luglio 2016): 386–405. http://dx.doi.org/10.1108/jstp-02-2015-0040.

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Purpose – The purpose of this paper is to re-examine the important question of what is wrong with interactive voice response (IVR) system service by expanding a spatially informed conceptualisation of virtual navigation which recognises the experience of movement within and through space. Design/methodology/approach – First, previous research on IVR systems is reviewed to highlight key themes to a service audience. Second, the metaphorical aspects of language used by the popular and trade press to describe IVR systems is examined. Usability and design issues are identified from previous research as a basis from reinterpreting them from a spatial perspective of navigation. Findings – Both figurative and conceptual spatial metaphors are used to describe the IVR system as an enclosed physical space, within which customers enter, feel stuck, get lost, or try to escape from. The usability issues of human memory, linearity, and feedback, can be reinterpreted from a spatial perspective as a basis for explaining confusion and frustration with IVR systems. Research limitations/implications – Since the paper is conceptual, further research is needed to empirically investigate different types and features of IVR systems. The possible influence of age and culture upon the spatial nature of experience is especially interesting topics for future study. Practical implications – The paper identifies the absence of space as an inherent limitation of IVR systems. It subsequently recommends that firms should provide spatial resources to support customer use of IVR systems, which is supported by the recent emergence of visual IVR. Originality/value – The paper introduces the broader literature on IVR systems to the service field as a basis for raising awareness about this ubiquitous technological component of telephone-based service delivery. It applies and develops a highly abstract conceptual perspective to examine and interpret the representation and experience of IVR systems, as a basis for explaining the confusion, frustration, and dislike of them.

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Wang, Dongxuan, Hui Wang, Shuang Wu, Xueqiu Yang e Jiansen Xu. "Intravitreal Ranibizumab Alone or in Combination with Calcium Dobesilate for the Treatment of Diabetic Macular Edema in Nonproliferative Diabetic Retinopathy Patients: 12-Month Outcomes of a Retrospective Study". International Journal of Clinical Practice 2022 (20 ottobre 2022): 1–6. http://dx.doi.org/10.1155/2022/6725225.

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Objective. This study investigates the efficacy of CaD combined with intravitreal ranibizumab for the treatment of diabetic macular edema (DME) in patients with nonproliferative DR. Methods. This retrospective, observational, case-control study enrolled consecutive patients newly diagnosed with DME. The patients were treated with 3-monthly loading dose injections of intravitreal ranibizumab (IVR) followed by pro re nata injections (3 + PRN), with or without daily oral CaD. The patients were treated and followed up for 12 months. We reviewed their medical records to determine the optical coherence tomography (OCT) findings, number of injections, best-corrected visual acuity (BCVA), and central macular thickness (CMT) at 3, 6, and 12 months after the first injection. Results. We reviewed 102 eyes of 102 patients; 54 patients received IVR combined with oral CaD (IVR + CaD group) and 48 received only IVR (IVR group). In both groups, BCVA was higher, and CMT was lower, at 3, 6, and 12 months after the injection compared to those at the baseline ( p < 0.05 for all), while there were no significant differences in BCVA improvement or CMT reduction between the two groups ( p > 0.05 ). The mean number of IVR injections was significantly lower in the IVR + CaD group than the IVR group (5.4 ± 1.1 vs. 6.7 ± 1.6 injections, p < 0.05 ) during 1 year of treatment. No adverse events were noted in either group. Conclusions. Compared to IVR alone, the addition of oral CaD to IVR in DME patients was safe and effective for improving visual function and restoring the retinal anatomy and was associated with the need for fewer injections.

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Chen, Xuting, Lin Zhou, Qi Zhang, Yu Xu, Peiquan Zhao e Hongping Xia. "Serum Vascular Endothelial Growth Factor Levels before and after Intravitreous Ranibizumab Injection for Retinopathy of Prematurity". Journal of Ophthalmology 2019 (20 maggio 2019): 1–6. http://dx.doi.org/10.1155/2019/2985161.

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Background. Retinopathy of prematurity (ROP) is one of the common complications of prematurity. Intravitreal injection of ranibizumab (IVR), an antivascular endothelial growth factor (VEGF) drug, showed significant benefit for ROP. However, there are concerns about systemic complications of anti-VEGF therapy in preterm infants. Objectives. To evaluate serum VEGF level in the systemic circulation after IVR and the complications associated with IVR for the premature infants with ROP. Methods. This prospective investigation assessed the serum concentrations of VEGF in ROP patients before and after IVR therapy. All the infants had binocular retinopathy and received IVR 0.25 mg per eye as the primary treatment. Serum samples were collected 1 day prior to injection and 1 day, 3 days, and 7 days after IVR treatment. Serum VEGF level was measured by the enzyme-linked immunosorbent assay (ELISA). Results. Fifteen infants (6 girls and 9 boys) were enrolled. The serum concentrations of VEGF 1 day before and 1 day, 3 days, and 7 days after a total of 0.5 mg intravitreal injections of ranibizumab were 226.9 (198.4, 272.4), 12.8 (7.0, 22.4), 16 (12.0, 20.8), and 33.7 (24.0, 48.0) pg/ml, respectively. Serum VEGF levels decreased significantly at 1 day, 3 days, and 7 days after IVR treatment compared with pretreatment concentration (P<0.05). Compared to days 1 and 3 after IVR, serum VEGF level at 7 days after IVR treatment increased significantly (P<0.05). Conclusion. Serum VEGF levels in patients with ROP were suppressed for at least 7 days after IVR treatment. Although the clinical significance of this phenomenon is uncertain, its safety profile requires further investigation.

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Hasegawa, Taiji, Yohei Takahashi, Ichiro Maruko, Akiko Kogure e Tomohiro Iida. "Macular vessel reduction as predictor for recurrence of macular oedema requiring repeat intravitreal ranibizumab injection in eyes with branch retinal vein occlusion". British Journal of Ophthalmology 103, n. 10 (4 dicembre 2018): 1367–72. http://dx.doi.org/10.1136/bjophthalmol-2018-312769.

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AimTo determine whether there are factors that can predict the frequency of recurrences of macular oedema associated with branch retinal vein occlusion (BRVO).MethodsWe reviewed the medical records of 31 eyes with treatment-naïve macular oedema associated with BRVO. All eyes received an intravitreal ranibizumab (IVR) injection and were followed with a pro re nata protocol for at least 12 months. A reinjection of ranibizmab was performed when the central foveal thickness was ≥300 µm. At 1 month after IVR injection, the macular vessel reduction was calculated by comparing the vessel density in the optical coherence tomography angiography in the BRVO involved half to that in the non-involved half.ResultsThe mean visual acuity improved from 0.35±0.27 logarithm of the minimal angle of resolution (logMAR) units (20/45; Snellen) at initial visit to 0.06±0.15 logMAR units (20/23) at 12 months (p<0.0001). During 12 months, the mean number of IVR injections was 3.8±1.8. Multivariate regression analysis showed that a greater macular vessel reduction at 1 month after initial IVR injection was significantly a negative predictor of frequency of IVR injections (β=−0.5065, p=0.0082). The visual acuity and the central foveal thickness at the initial visit or at 1 month after initial IVR injection were not predictive factors for frequency of IVR injections.ConclusionsPatients with BRVO with a large macular vessel reduction at 1 month after an initial IVR injection have fewer recurrences and thus lower frequency of IVR injections during 12 months.

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Ha, Jee Soo, Jinhyung Jeon, Jong Cheol Ko, Hye Sun Lee, Juyeon Yang, Daeho Kim, June Seok Kim, Won Sik Ham, Young Deuk Choi e Kang Su Cho. "Intravesical Recurrence after Radical Nephroureterectomy in Patients with Upper Tract Urothelial Carcinoma Is Associated with Flexible Diagnostic Ureteroscopy, but Not with Rigid Diagnostic Ureteroscopy". Cancers 14, n. 22 (16 novembre 2022): 5629. http://dx.doi.org/10.3390/cancers14225629.

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(1) Background: We assessed the impact of diagnostic ureteroscopy (URS) on intravesical recurrence (IVR) following radical nephroureterectomy (RNU) for upper tract urothelial carcinoma according to the type of URS. (2) Methods: Data on 491 consecutive patients who underwent RNU at two institutions between 2016 and 2019 were retrospectively reviewed. The study population was classified according to the type of URS performed before RNU as follows: non-URS, rigid URS, and flexible URS. The study outcome was IVR occurring within 1 year of RNU. Univariable and multivariable Cox proportional hazards models were used to estimate the risk of IVR. (3) Results: Altogether, 396 patients were included for analysis. Rigid and flexible URS were performed in 178 (45%) and 111 (28%) patients, respectively, while 107 (27%) patients did not undergo URS. IVR was identified in 99 (25%) patients. Multivariable Cox regression analysis revealed that the flexible URS group was significantly associated with increased IVR, compared to the non-URS group (HR = 1.807, p = 0.0416). No significant difference in IVR was observed between the non-URS and rigid URS groups (HR = 1.301, p = 0.3388). (4) Conclusions: In patients with UTUC undergoing RNU, rigid URS may not increase the risk of IVR, whereas flexible URS appears to be associated with a higher risk of IVR.

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Palukaitis, Peter, Masoud Akbarimotlagh, Eseul Baek e Ju-Yeon Yoon. "The Secret Life of the Inhibitor of Virus Replication". Viruses 14, n. 12 (14 dicembre 2022): 2782. http://dx.doi.org/10.3390/v14122782.

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The inhibitor of virus replication (IVR) is an inducible protein that is not virus-target-specific and can be induced by several viruses. The GenBank was interrogated for sequences closely related to the tobacco IVR. Various RNA fragments from tobacco, tomato, and potato and their genomic DNA contained IVR-like sequences. However, IVRs were part of larger proteins encoded by these genomic DNA sequences, which were identified in Arabidopsis as being related to the cyclosome protein designated anaphase-promoting complex 7 (APC7). Sequence analysis of the putative APC7s of nine plant species showed proteins of 558-561 amino acids highly conserved in sequence containing at least six protein-binding elements of 34 amino acids called tetratricopeptide repeats (TPRs), which form helix–turn–helix structures. The structures of Arabidopsis APC7 and the tobacco IVR proteins were modeled using the AlphaFold program and superimposed, showing that IVR had the same structure as the C-terminal 34% of APC7, indicating that IVR was a product of the APC7 gene. Based on the presence of various transcription factor binding sites in the APC7 sequences upstream of the IVR coding sequences, we propose that IVR could be expressed by these APC7 gene sequences involving the transcription factor SHE1.

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Spalter, Anne Morgan, Philip Andrew Stone, Barbara J. Meier, Timothy S. Miller e Rosemary Michelle Simpson. "Interaction in an IVR Museum of Color: Constructivism Meets Virtual Reality". Leonardo 35, n. 1 (febbraio 2002): 87–90. http://dx.doi.org/10.1162/002409402753689380.

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Immersive Virtual Reality (IVR) environments would seem naturally to lend themselves to hands-on approaches to learning, but the success of such virtual “direct experience” depends heavily on the design of interface and interaction techniques. IVR presents surprisingly difficult interface challenges, and the study of interface and interaction design for educational IVR use is just beginning. In this paper, the authors discuss three issues encountered in the creation of an IVR-based educational project: the use of architectural spaces for structuring a sequence of modules, the tradeoffs between metaphorical fidelity and convenience, and the use of IVR in interaction with visualizations of abstract concepts.

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Kato, Mamoru, Koichi Chida, Masato Munehisa, Tadaya Sato, Yohei Inaba, Masatoshi Suzuki e Masayuki Zuguchi. "Non-Lead Protective Aprons for the Protection of Interventional Radiology Physicians from Radiation Exposure in Clinical Settings: An Initial Study". Diagnostics 11, n. 9 (3 settembre 2021): 1613. http://dx.doi.org/10.3390/diagnostics11091613.

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Radiation protection/evaluation during interventional radiology (IVR) poses a very important problem. Although IVR physicians should wear protective aprons, the IVR physician may not tolerate wearing one for long procedures because protective aprons are generally heavy. In fact, orthopedic problems are increasingly reported in IVR physicians due to the strain of wearing heavy protective aprons during IVR. In recent years, non-Pb protective aprons (lighter weight, composite materials) have been developed. Although non-Pb protective aprons are more expensive than Pb protective aprons, the former aprons weigh less. However, whether the protective performance of non-Pb aprons is sufficient in the IVR clinical setting is unclear. This study compared the ability of non-Pb and Pb protective aprons (0.25- and 0.35-mm Pb-equivalents) to protect physicians from scatter radiation in a clinical setting (IVR, cardiac catheterizations, including percutaneous coronary intervention) using an electric personal dosimeter (EPD). For radiation measurements, physicians wore EPDs: One inside a personal protective apron at the chest, and one outside a personal protective apron at the chest. Physician comfort levels in each apron during procedures were also evaluated. As a result, performance (both the shielding effect (98.5%) and comfort (good)) of the non-Pb 0.35-mm-Pb-equivalent protective apron was good in the clinical setting. The radiation-shielding effects of the non-Pb 0.35-mm and Pb 0.35-mm-Pb-equivalent protective aprons were very similar. Therefore, non-Pb 0.35-mm Pb-equivalent protective aprons may be more suitable for providing radiation protection for IVR physicians because the shielding effect and comfort are both good in the clinical IVR setting. As non-Pb protective aprons are nontoxic and weigh less than Pb protective aprons, non-Pb protective aprons will be the preferred type for radiation protection of IVR staff, especially physicians.

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Feng, Qinna, Heng Luo, Wenhao Li, Ying Chen e Jiakai Zhang. "The Moderating Effect of Debriefing on Learning Outcomes of IVR-Based Instruction: An Experimental Research". Applied Sciences 11, n. 21 (5 novembre 2021): 10426. http://dx.doi.org/10.3390/app112110426.

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With its ability to afford immersive and interactive learning experiences, virtual reality has been widely used to support experiential learning, of which the learning effectiveness is promoted by the instructional component of debriefing. The current literature on debriefing mainly focuses on the traditional learning contexts while little is known on its effectiveness in immersive virtual reality (IVR) learning environments. Based on the theories of experiential learning and debriefing, this study designed a debriefing strategy based on simulated learning experience and investigated its effectiveness on knowledge and behavioral learning in an IVR learning program, using a randomized controlled trial with 77 elementary students from Hubei province in China. The study results support the efficacy of IVR on improving knowledge acquisition and behavioral performance, and reveal a significant moderating effect of debriefing on the effectiveness of IVR learning environments. The study confirms the critical role of debriefing in IVR-based instruction and provides theoretical and practical implications for the design and implementation of effective IVR learning environments.

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Fukushima, Tetsuya, Eiji Kidoya, Tooru Ikeno e Hiroyuki Komuro. "153. Suggest of Exclusive IVR System". Japanese Journal of Radiological Technology 47, n. 8 (1991): 1188. http://dx.doi.org/10.6009/jjrt.kj00003323897.

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Wellmann, Carl. "One Hundred Years of the IVR". Archiv für Rechts- und Sozialphilosophie 95, n. 1 (2009): 1–13. http://dx.doi.org/10.25162/arsp-2009-0001.

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Kay, Kenneth G. "IVR Formulation of Miller's Correspondence Relations†". Journal of Physical Chemistry A 105, n. 12 (marzo 2001): 2535–45. http://dx.doi.org/10.1021/jp0034675.

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Mbamala, Chinyere V., Chika N. John e Nkechi F. Esomonu. "DEVELOPMENT OF AN IVR PAYMENT SYSTEM". International Research Journal of Computer Science 9, n. 9 (30 settembre 2022): 359–66. http://dx.doi.org/10.26562/irjcs.2022.v0909.03.

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The payment system in Nigeria has experienced a major shift in recent years from the traditional mode of payment, resulting in a cashless society through mobile banking. This is a welcome development as the traditional system has a lot of drawbacks like spending hours on a queue just to make a transaction. Also, the advent of debit cards poses a challenge of inability to make payments if the card is not readily available, coupled with outrageous service charges from POS operators. Even in mobile banking, some challenges still abound such as network failure and session timeout which can be experienced while using USSD or Mobile banking applications. We are proposing an IVR payment system for customers to make payments to merchants for their goods and services. This system is very unique as it is yet to be explored in this part of the world. Imagine being able to make payments through a phone call. The need for better payment alternatives which hinges on convenience, affordability, accessibility and speed cannot be overemphasized. Our system does not require mobile data to be able to make payment transactions after purchase. Interestingly, it does not necessarily require a smartphone and as such has a high penetration especially in the rural areas, also providing a vocal guide to initiate payments for those who are visually impaired. We are able to achieve this by implementing the IVR technology, enabling customers and merchants to enroll on the platform and carry out payment transactions.

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Elran, Y., e K. G. Kay. "Semiclassical IVR treatment of reactive collisions". Journal of Chemical Physics 116, n. 24 (22 giugno 2002): 10577–88. http://dx.doi.org/10.1063/1.1479137.

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Ichida, Takao, Minoru Hosogai e Hiroaki Kudoh. "Development of navigation system for IVR". Japanese Journal of Radiological Technology 52, n. 2 (1996): 235. http://dx.doi.org/10.6009/jjrt.kj00001354157.

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Kawasaki, Sadahiro, Manabu Takahashi, Yoshihiro Nakaya, Johji Sasaki, Hiroyuki Fujikawa, Takashi Satoh e Yasuhisa Saitoh. "Usefulness of IVR-CT/Angio System". Japanese Journal of Radiological Technology 52, n. 9 (1996): 1055. http://dx.doi.org/10.6009/jjrt.kj00001354797.

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Chida, Koichi. "Radiation Protection Basics for IVR Staff". Japanese Journal of Radiological Technology 64, n. 8 (2008): 1009–14. http://dx.doi.org/10.6009/jjrt.64.1009.

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Sakamoto, Hajime. "Angiography and IVR in the Extremity". Japanese Journal of Radiological Technology 64, n. 4 (2008): 451–62. http://dx.doi.org/10.6009/jjrt.64.451.

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Dean, Dwane H. "What's wrong with IVR self‐service". Managing Service Quality: An International Journal 18, n. 6 (14 novembre 2008): 594–609. http://dx.doi.org/10.1108/09604520810920086.

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Zewail, Ahmed H. "IVR: Its Coherent and Incoherent Dynamics". Berichte der Bunsengesellschaft für physikalische Chemie 89, n. 3 (marzo 1985): 264–70. http://dx.doi.org/10.1002/bbpc.19850890315.

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Berezowsky, Claudia A., Rodrigo P. Hoyos e Paulo B. Lourenco. "Experience using immersive virtual reality simulation during an AO trauma regional course in Latin America". Journal of Musculoskeletal Surgery and Research 6 (16 novembre 2022): 278–82. http://dx.doi.org/10.25259/jmsr_129_2022.

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Virtual reality has been used in orthopedics for several years now, both as a training and assessment tool. The use of extended reality technologies in surgical training and simulation is the most developed and validated of all the current applications. However, formal and massive implementation in continuous orthopedic education has yet to happen. This report aimed to present our experience during the first AO trauma regional courses in Latin America that incorporated the use of immersive virtual reality (IVR) simulation as a hands-on activity as part of the program. IVR was used for the first time as part of a course activity during the advanced principles of fracture treatment course as part of the AO regional courses in Rio de Janeiro, Brazil, in 2022. The activity was implemented for 120 participants in a back-to-back fashion. Each participant used the IVR simulation for the trochanteric nail application and did a traditional hands-on exercise with a synthetic bone model. An appreciation survey was answered by participants. Seventy-four persons answered the survey. About 62% considered that the IVR simulation was like reality, and 76.38% thought that IVR was helpful in the learning process. The majority (91.6%) would like to use IVR for training, and 93% would be willing to use IVR again. This was the first time, IVR simulation was implemented as a massive and structured educational activity during the principles of fracture treatment course. Participant feedback was positive, and most people would use IVIR again. A systematic way of implementing IVR simulation sessions with educational goals needs to be developed for these activities.

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Khairadeen Ali, Ahmed, One Jae Lee, Doyeop Lee e Chansik Park. "Remote Indoor Construction Progress Monitoring Using Extended Reality". Sustainability 13, n. 4 (20 febbraio 2021): 2290. http://dx.doi.org/10.3390/su13042290.

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Construction Progress monitoring noticed recent expansions by adopting vision and laser technologies. However, inspectors need to personally visit the job-site or wait for a time gap to process data captured from the construction site to use for inspection. Recent inspection methods lacks automation and real-time data exchange, therefore, it needs inspection manpower for each job-site, the health risk of physical interaction between workers and inspector, loss of energy, data loss, and time consumption. To address this issue, a near real-time construction work inspection system called iVR is proposed; this system integrates 3D scanning, extended reality, and visual programming to visualize interactive onsite inspection for indoor activities and provide numeric data. The iVR comprises five modules: iVR-location finder (finding laser scanner located in the construction site) iVR-scan (capture point cloud data of job-site indoor activity), iVR-prepare (processes and convert 3D scan data into a 3D model), iVR-inspect (conduct immersive visual reality inspection in construction office), and iVR-feedback (visualize inspection feedback from job-site using augmented reality). An experimental lab test is conducted to verify the applicability of iVR process; it successfully exchanges required information between construction job-site and office in a specific time. This system is expected to assist Engineers and workers in quality assessment, progress assessments, and decision-making which can realize a productive and practical communication platform, unlike conventional monitoring or data capturing, processing, and storage methods, which involve storage, compatibility and time-consumption issues.

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Gómez-Tone, Hugo C., John Bustamante Escapa, Paola Bustamante Escapa e Jorge Martin-Gutierrez. "The Drawing and Perception of Architectural Spaces through Immersive Virtual Reality". Sustainability 13, n. 11 (1 giugno 2021): 6223. http://dx.doi.org/10.3390/su13116223.

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The technologies that have sought to intervene in the architectural drawing process have focused on the sense of sight, leaving aside the use of the hands and the entire body that together achieve more sensory designs. Nowadays, to the benefit of the draftsman, that ideal scenery in which sight, hands and body work holistically is returning thanks to Immersive Virtual Reality (IVR). The purpose of this research is to analyze the perception of two-dimensionally drawn spaces, the drawing of such spaces through three-dimensional sketches in IVR, and both the perception of 3D sketched spaces and those which are also modeled realistically in IVR. First and fifth year architecture students went through the four phases of the experiment: (a) the perception of a space based on 2D sketches, (b) real-scale 3D space drawing in IVR, (c) the perception of a space drawn in 3D in IVR, and (d) the perception of the same space realistically modeled in 3D in IVR. Through three questionnaires and a grading sheet, the data was obtained. The perception of two-dimensionally drawn spaces was high (70.8%), while the precision of a space drawn in an IVR was even higher (83.9%). The real or natural scale in which the spaces can be experienced in an IVR is the characteristic that was most recognized by the students; however, this and the other qualities did not allow for a reliable conclusion for a homogeneous perception of sensations within the virtual spaces.

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Xu, Yu, Xiaoli Kang, Qi Zhang, Qiujing Huang, Jiao Lv e Peiquan Zhao. "Combination of Intravitreal Injection of Ranibizumab and Photocoagulation for the Treatment of Aggressive Posterior Retinopathy of Prematurity with Vitreous Hemorrhage". Journal of Ophthalmology 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/5029278.

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To investigate the efficacy of intravitreal ranibizumab (IVR) combined with laser photocoagulation for aggressive posterior retinopathy of prematurity (AP-ROP) patients with vitreous hemorrhage, we conducted a retrospective observational case series study. A total of 37 eyes of 20 patients’ medical records were reviewed. Patients first received IVR (0.25 mg/0.025 mL) and later photocoagulation. The mean postconceptual age of injection was 34.6 ± 1.4 weeks, and the mean follow-up period was 39.3 ± 8.3 weeks. During the follow-up, 96.6% eyes had various degree of rapid absorption of vitreous hemorrhage after IVR. The mean time of received first photocoagulation after IVR was 4.8 ± 2.9 weeks. Ten (27.0%) eyes received second laser therapy and the mean time of second laser therapy after IVR was 3.2 ± 0.8 weeks. All eyes exhibited adequate regression of ROP and were stable with attached retina. Fibrosis membrane was observed in seven eyes (18.9%) and three of them demonstrated mild ectopic macula. No significant side effects related to IVR were observed. So IVR could be conducted as primary treatment of AP-ROP associated with vitreous hemorrhage, which can improve the fundus visibility, followed by conventional photocoagulation. Further randomized controlled trials are necessary to compare the clinical efficacy and safety with conventional interventions.

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Tomura, Masatoshi, Kouji Natori, Mitsutoshi Naitoh, Katsuhei Horita, Kougi Kurikawa e Mamoru Iwane. "298. Development of the IVR Imaging System". Japanese Journal of Radiological Technology 49, n. 8 (1993): 1322. http://dx.doi.org/10.6009/jjrt.kj00003324885.

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Snoswell, Aaron J., e Centaine L. Snoswell. "Immersive Virtual Reality in Health Care: Systematic Review of Technology and Disease States". JMIR Biomedical Engineering 4, n. 1 (26 settembre 2019): e15025. http://dx.doi.org/10.2196/15025.

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Background Immersive virtual reality (IVR) presents new possibilities for application in health care. Health care professionals can now immerse their patients in environments to achieve exposure to a specific scene or experience, evoke targeted emotional responses, inspire, or distract from an experience occurring in reality. Objective This review aimed to identify patient-focused applications for head-mounted IVR for acute treatment of health conditions and determine the technical specifications of the systems used. Methods A systematic review was conducted by searching medical and engineering peer-reviewed literature databases in 2018. The databases included PubMed, EMBASE, Cumulative Index to Nursing and Allied Health Literature, Association for Computing Machinery, Institute of Electrical and Electronics Engineers, Scopus, and Web of Science. Search terms relating to health and IVR were used. To be included, studies had to investigate the effectiveness of IVR for acute treatment of a specific health condition. IVR was defined as a head-mounted platform that provides virtual and auditory immersion for the participant and includes a minimum of 3 degrees of orientation tracking. Once identified, data were extracted from articles and aggregated in a narrative review format. Results A total of 58 studies were conducted in 19 countries. The studies reported IVR use for 5 main clinical areas: neurological and development (n=10), pain reduction through distraction (n=20), exposure therapy for phobias (n=9), psychological applications (n=14), and others (n=5). Studies were primarily feasibility studies exploring systems and general user acceptance (n=29) and efficacy studies testing clinical effect (n=28). Conclusions IVR has a promising future in health care, both in research and commercial realms. As many of the studies examined are still exploring the feasibility of IVR for acute treatment of health conditions, evidence for the effectiveness of IVR is still developing.

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