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Добірка наукової літератури з теми "Stereotactic standardization"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Stereotactic standardization"

Onimaru, Rikiya. "Standardization of Stereotactic Body Radiotherapy for Non-Small Cell Lung Cancer." Haigan 55, no. 6 (2015): 918–23. http://dx.doi.org/10.2482/haigan.55.918.

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Torrens, Michael, Caroline Chung, Hyun-Tai Chung, Patrick Hanssens, David Jaffray, Andras Kemeny, David Larson, et al. "Standardization of terminology in stereotactic radiosurgery: Report from the Standardization Committee of the International Leksell Gamma Knife Society." Journal of Neurosurgery 121, Suppl_2 (December 2014): 2–15. http://dx.doi.org/10.3171/2014.7.gks141199.

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ObjectThis report has been prepared to ensure more uniform reporting of Gamma Knife radiosurgery treatment parameters by identifying areas of controversy, confusion, or imprecision in terminology and recommending standards.MethodsSeveral working group discussions supplemented by clarification via email allowed the elaboration of a series of provisional recommendations. These were also discussed in open session at the 16th International Leksell Gamma Knife Society Meeting in Sydney, Australia, in March 2012 and approved subject to certain revisions and the performance of an Internet vote for approval from the whole Society. This ballot was undertaken in September 2012.ResultsThe recommendations in relation to volumes are that Gross Target Volume (GTV) should replace Target Volume (TV); Prescription Isodose Volume (PIV) should generally be used; the term Treated Target Volume (TTV) should replace TVPIV, GTV in PIV, and so forth; and the Volume of Accepted Tolerance Dose (VATD) should be used in place of irradiated volume. For dose prescription and measurement, the prescription dose should be supplemented by the Absorbed Dose, or DV% (for example, D95%), the maximum and minimum dose should be related to a specific tissue volume (for example, D2% or preferably D1 mm3), and the median dose (D50%) should be recorded routinely. The Integral Dose becomes the Total Absorbed Energy (TAE). In the assessment of planning quality, the use of the Target Coverage Ratio (TTV/ GTV), Paddick Conformity Index (PCI = TTV2/[GTV · PIV]), New Conformity Index (NCI = [GTV · PIV]/TTV2), Selectivity Index (TTV/PIV), Homogeneity Index (HI = [D2% –D98%]/D50%), and Gradient Index (GI = PIV0.5/PIV) are reemphasized. In relation to the dose to Organs at Risk (OARs), the emphasis is on dose volume recording of the VATD or the dose/volume limit (for example, V10) in most cases, with the additional use of a Maximum Dose to a small volume (such as 1 mm3) and/or a Point Dose and Mean Point Dose in certain circumstances, particularly when referring to serial organs. The recommendations were accepted by the International Leksell Gamma Knife Society by a vote of 92% to 8%.ConclusionsAn agreed-upon and uniform terminology and subsequent standardization of certain methods and procedures will advance the clinical science of stereotactic radiosurgery.

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Kamiryo, Toshifumi, and Edward R. Laws Jr. "Stereotactic Frame-Based Error in Magnetic-Resonance-Guided Stereotactic Procedures: A Method for Measurement of Error and Standardization of Technique." Stereotactic and Functional Neurosurgery 67, no. 3-4 (1997): 198–209. http://dx.doi.org/10.1159/000099448.

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Chiesa, Silvia, Barbara Tolu, Silvia Longo, Barbara Nardiello, Nikola Dino Capocchiano, Federica Rea, Luca Capone, et al. "A new standardized data collection system for brain stereotactic external radiotherapy: the PRE.M.I.S.E project." Future Science OA 6, no. 7 (August 1, 2020): FSO596. http://dx.doi.org/10.2144/fsoa-2020-0015.

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Background: In recent years, novel radiation therapy techniques have moved clinical practice toward tailored medicine. An essential role is played by the decision support system, which requires a standardization of data collection. The Aim of the Prediction Models In Stereotactic External radiotherapy (PRE.M.I.S.E.) project is the implementation of systems that analyze heterogeneous datasets. This article presents the project design, focusing on brain stereotactic radiotherapy (SRT). Materials & methods: First, raw ontology was defined by exploiting semiformal languages (block and entity relationship diagrams) and the natural language; then, it was transposed in a Case Report Form, creating a storage system. Results: More than 130 brain SRT’s variables were selected. The dedicated software Beyond Ontology Awareness (BOA-Web) was set and data collection is ongoing. Conclusion: The PRE.M.I.S.E. project provides standardized data collection for a specific radiation therapy technique, such as SRT. Future aims are: including other centers and validating an extracranial SRT ontology.

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Miller, Kai J., Casey H. Halpern, Mark F. Sedrak, John A. Duncan, and Gerald A. Grant. "A novel mesial temporal stereotactic coordinate system." Journal of Neurosurgery 130, no. 1 (January 2018): 67–75. http://dx.doi.org/10.3171/2017.7.jns162267.

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OBJECTIVEStereotactic laser ablation and neurostimulator placement represent an evolution in staged surgical intervention for epilepsy. As this practice evolves, optimal targeting will require standardized outcome measures that compare electrode lead or laser source with postprocedural changes in seizure frequency. The authors propose and present a novel stereotactic coordinate system based on mesial temporal anatomical landmarks to facilitate the planning and delineation of outcomes based on extent of ablation or region of stimulation within mesial temporal structures.METHODSThe body of the hippocampus contains a natural axis, approximated by the interface of cornu ammonis area 4 and the dentate gyrus. The uncal recess of the lateral ventricle acts as a landmark to characterize the anterior-posterior extent of this axis. Several volumetric rotations are quantified for alignment with the mesial temporal coordinate system. First, the brain volume is rotated to align with standard anterior commissure–posterior commissure (AC-PC) space. Then, it is rotated through the axial and sagittal angles that the hippocampal axis makes with the AC-PC line.RESULTSUsing this coordinate system, customized MATLAB software was developed to allow for intuitive standardization of targeting and interpretation. The angle between the AC-PC line and the hippocampal axis was found to be approximately 20°–30° when viewed sagittally and approximately 5°–10° when viewed axially. Implanted electrodes can then be identified from CT in this space, and laser tip position and burn geometry can be calculated based on the intraoperative and postoperative MRI.CONCLUSIONSWith the advent of stereotactic surgery for mesial temporal targets, a mesial temporal stereotactic system is introduced that may facilitate operative planning, improve surgical outcomes, and standardize outcome assessment.

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Dabbous, Firas M., Sarah M. Friedewald, Ellen O'Meara, Donald L. Weaver, Karen Wernli, Kimberly Ray, and Garth H. Rauscher. "Diagnostic accuracy of core needle biopsy by image guidance and vacuum assistance." Journal of Clinical Oncology 35, no. 15_suppl (May 20, 2017): e12081-e12081. http://dx.doi.org/10.1200/jco.2017.35.15_suppl.e12081.

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e12081 Background: Half of the women in the US undergoing annual screening mammography over 10 years require at least one additional imaging study. Of these women, 7%-17% undergo biopsies, the majority of which (77%) are benign. We sought to estimate the accuracy of core needle biopsy (CNB) by method of imaging guidance and use of vacuum assistance (VA). Methods: Data were pooled from four registries participating in the Breast Cancer Surveillance Consortium (bcsc-research.org) including facilities that perform both VA and non-VA CNB. Each registry collects data on screening mammography and breast pathology reports linked to their state cancer registries or regional Surveillance, Epidemiology and End Results registry. Sensitivity was defined as the proportion of positive biopsies among all cancers diagnosed within 12 months of biopsy. PPV3 was defined as the percentage of all biopsies performed that were positive for cancer. We estimated the adjusted average population risks/rates by modality using marginal standardization with logistic regression in STATA.Results: : Among the 37,270 CNBs, breast malignancy was found in 9,241 women (28.6%), of which 2,276 (25%) were ductal carcinoma in-situ. Sensitivity was 90.5% (95% CI 82.6-98.4) for non-VA Stereotactic (n = 415), 95.4% (95% CI 94.7-96.1) for VA Stereotactic (n = 18,733), 96.1% (95% CI 95.4-96.7) for non-VA ultrasound (n = 14,803), 95.1% (95% CI 93.7-96.5) for VA Ultrasound (n = 3,271) and 82.3% (95% CI 59.9-104.6) for non-VA MRI (n = 48). PPV3 was 12.2% (95% CI 9.0, 15.3), 17.7% (95% CI 17.2, 18.3), 28.6% (95% CI 27.8-29.4), 32.1% (95% CI 30.4-33.8) and 16.9% (95% CI 5.3, 28.5), respectively. For stereotactic biopsies, VA was associated with improved PPV3 (p = 0.01) without any change in sensitivity compared to non-VA Stereotactic biopsies.Conclusions: Our multicenter data confirm that VA-stereotactic CNB and ultrasound CNB with or without VA have high sensitivity and thus represent effective alternatives to open surgical biopsy.

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Thakur, Jai Deep, Anirban Deep Banerjee, Imad Saeed Khan, Ashish Sonig, Cedric D. Shorter, Gale L. Gardner, Anil Nanda, and Bharat Guthikonda. "An update on unilateral sporadic small vestibular schwannoma." Neurosurgical Focus 33, no. 3 (September 2012): E1. http://dx.doi.org/10.3171/2012.6.focus12144.

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Advances in neuroimaging have increased the detection rate of small vestibular schwannomas (VSs, maximum diameter < 25 mm). Current management modalities include observation with serial imaging, stereotactic radiosurgery, and microsurgical resection. Selecting one approach over another invites speculation, and no standard management consensus has been established. Moreover, there is a distinct clinical heterogeneity among patients harboring small VSs, making standardization of management difficult. The aim of this article is to guide treating physicians toward the most plausible therapeutic option based on etiopathogenesis and the highest level of existing evidence specific to the different cohorts of hypothetical case scenarios. Hypothetical cases were created to represent 5 commonly encountered scenarios involving patients with sporadic unilateral small VSs, and the literature was reviewed with a focus on small VS. The authors extrapolated from the data to the hypothetical case scenarios, and based on the level of evidence, they discuss the most suitable patient-specific treatment strategies. They conclude that observation and imaging, stereotactic radiosurgery, and microsurgery are all important components of the management strategy. Each has unique advantages and disadvantages best suited to certain clinical scenarios. The treatment of small VS should always be tailored to the clinical, personal, and social requirements of an individual patient, and a rigid treatment protocol is not practical.

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Sarkar, Biplab, Anusheel Munshi, Tharmarnadar Ganesh, Arjunan Manikandan, Satheesh Kumar Anbazhagan, and Bidhu Kalyan Mohanti. "Standardization of volumetric modulated arc therapy‐based frameless stereotactic technique using a multidimensional ensemble‐aided knowledge‐based planning." Medical Physics 46, no. 5 (April 8, 2019): 1953–62. http://dx.doi.org/10.1002/mp.13470.

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Mitchell, Kyle G., David B. Nelson, Erin M. Corsini, Arlene M. Correa, Jeremy J. Erasmus, Wayne L. Hofstetter, Reza J. Mehran, et al. "Surveillance After Treatment of Non-Small-Cell Lung Cancer: A Call for Multidisciplinary Standardization." Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery 15, no. 1 (December 26, 2019): 57–65. http://dx.doi.org/10.1177/1556984519886281.

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Objective Though interest in expansion of the use of less-invasive therapies among operable non-small-cell lung cancer (NSCLC) patients is growing, it is not clear that post-treatment surveillance has been comparable between treatment modalities. We sought to characterize institutional surveillance patterns after NSCLC therapy with stereotactic body radiation therapy (SBRT) and lobectomy. Methods NSCLC patients treated with lobectomy or SBRT (2005 to 2016) at a single institution were identified. Natural language processing searched data fields within axial surveillance imaging reports for findings suggestive of recurrence. Duration and patterns of institutional surveillance were compared between the 2 groups. Results Three thousand forty-two patients (73.5% lobectomy, 26.5% SBRT) met inclusion criteria. Patients had a longer median duration of surveillance after lobectomy (28.0 months vs SBRT 12.3 months, P < 0.001) and were more likely to undergo histopathological evaluation of clinically suspected relapse (206/274 [75.2%] vs SBRT 54/113 [47.8%], P < 0.001). Patients with clinical suspicion of recurrence had longer durations of institutional surveillance than those who did not among both cohorts (lobectomy 44.4 months vs 25.9, P < 0.001; SBRT 27.9 vs 10.3, P < 0.001). Landmark analyses at 1 and 3 years after therapy identified associations between receipt of lobectomy and ongoing surveillance at each time point (1 year odds ratio [OR] 2.10, P < 0.001; 3 years OR 1.71, P < 0.001) among all patients and those with documented stage I disease. Conclusions We identified potential heterogeneity in institutional surveillance patterns after treatment of NSCLC with 2 therapeutic modalities. As less-invasive treatment options for operable patients expand, it will be critical to implement rigorous surveillance paradigms across all modalities.

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Ueda, Yoshihiro, Toru Takakura, Seiichi Ota, Satoshi Kito, Koji Sasaki, Hidetoshi Shimizu, Daisaku Tatsumi, Shinsuke Yano, and Mitsuhiro Nakamura. "Questionnaire survey on treatment planning techniques for lung stereotactic body radiotherapy in Japan." Journal of Radiation Research 61, no. 1 (December 17, 2019): 104–16. http://dx.doi.org/10.1093/jrr/rrz081.

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ABSTRACT This study aimed to obtain details regarding treatment planning techniques for lung stereotactic body radiation therapy (SBRT) employed at each institution in Japan by using a questionnaire survey. An Internet questionnaire survey on SBRT procedures performed in 2016 was conducted by the QA/QC committee of the Japan Society of Medical Physics from April to June 2017. The questionnaire assessed two aspects: the environment for SBRT at each institution and the treatment planning techniques with and without respiratory motion management techniques (RMMT). Of the 309 evaluated responses, 218 institutions had performed SBRT. A total of 186 institutions performed SBRT without RMMT and 139 institutions performed SBRT with RMMT. When respiratory motion was ≥10 mm, 69 institutions applied RMMT. The leading RMMT were breath holding (77 institutions), respiratory gating (49 institutions) and real-time tumor tracking (11 institutions). The most frequently used irradiation technique was 3D conformal radiotherapy, which was used in 145 institutions without RMMT and 119 institutions with RMMT. Computed tomography (CT) images acquired under free breathing were mostly used for dose calculation for patients treated without RMMT. The usage ratio of IMRT/VMAT to SBRT is low in Japan, compared to elsewhere in the world (<20% vs ≥70%). Among the available dose calculation algorithms, superposition convolution was the most frequently used regardless of RMMT; however, 2% of institutions have not yet made heterogeneity corrections. In the prescription setting, about half of the institutions applied point prescriptions. The survey results revealed the most frequently used conditions, which may facilitate standardization of treatment techniques in lung SBRT.

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Більше джерел

Дисертації з теми "Stereotactic standardization"

Цікало, Владислав Олексійович. "Просторова стандартизація ОФЕКТ зображень головного мозку". Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/40168.

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Об’єктом розгляду даної дипломної роботи є «Просторова стандартизація ОФЕКТ зображень головного мозку», її розробка, проведення досліджень та отримання їх результатів, а також вдосконалення, шляхом створення бази даних для зберігання інформації про пацієнтів, та інтерфейсу в середовищі Matlab для зручного її використання. Метою роботи є створення методики просторової стандартизації зображень однофотонної емісійної комп’ютерної томографії (ОФЕКТ) для збільшення точності подальших розрахунків симетрії головного мозку, та зменшення впливу суб’єктивного людського фактору, шляхом автоматизації методики. У першому розділі дані загальні положення про поняття сцинтиграфії, ОФЕКТ дослідження, а також обладнання (гамма-камера), та радіофармацевтичні препарати що в ньому застосовуються. У другому розділі йдеться про методику розробленого методу стандартизації зображень, отриманих внаслідок проведення ОФЕКТ досліджень головного мозку. Третій розділ несе в собі інформацію про результати розробленої методики стандартизації ОФЕКТ досліджень, а також про знайдену особливість серединно-півкулеву симетрію. У четвертому розділі представлена інформація про створену базу даних для зберігання інформації про пацієнтів, а також розроблений інтерфейс для зручного її використання.
The subject is the «Spatial standardization of SPECT images of the brain», its development, research and obtaining their results, as well as improvement by creating a database for storing information about patients, and an interface in the Matlab environment for easy use. The aim of the work is to create a method of spatial standardization of images of single-photon emission computed tomography (SPECT) to increase the accuracy of further calculations of brain symmetry, and reduce the impact of subjective human factors by automating the method. The first section provides general provisions on the concept of scintigraphy, SPECT research, as well as equipment (gamma camera), and radiopharmaceuticals used in it. The second section deals with the methodology of the developed method of standardization of images obtained because of SPECT brain research. The third section contains information about the results of the developed method of standardization of SPECT research, as well as about the found feature of mid-hemispheric symmetry. The fourth section presents information about the created database for storing information about patients, as well as an interface for its convenient use.

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Тези доповідей конференцій з теми "Stereotactic standardization"

Nikolov, Nikolay, Sergiy Makeev, Tetyana Novikova, Yelizaveta Kriukova, and Vladislaw Tsikalo. "Automated Stereotactic Standardization of Brain SPECT with 99mTc-HMPAO." In 2020 IEEE 40th International Conference on Electronics and Nanotechnology (ELNANO). IEEE, 2020. http://dx.doi.org/10.1109/elnano50318.2020.9088774.

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