Academic Journal
Reliability of the gamma index analysis as a verification method of volumetric modulated arc therapy plans
| العنوان: | Reliability of the gamma index analysis as a verification method of volumetric modulated arc therapy plans |
|---|---|
| المؤلفون: | Jong Min Park, Jung-in Kim, So-Yeon Park, Do Hoon Oh, Sang-Tae Kim |
| المصدر: | Radiation Oncology, Vol 13, Iss 1, Pp 1-14 (2018) |
| بيانات النشر: | BMC, 2018. |
| سنة النشر: | 2018 |
| المجموعة: | LCC:Medical physics. Medical radiology. Nuclear medicine LCC:Neoplasms. Tumors. Oncology. Including cancer and carcinogens |
| مصطلحات موضوعية: | Gamma passing rate, Volumetric modulated arc therapy, Patient-specific quality assurance, Log file analysis, Modulation degree, Medical physics. Medical radiology. Nuclear medicine, R895-920, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282 |
| الوصف: | Abstract Background We investigate the gamma passing rate (GPR) consistency when applying different types of gamma analyses, linacs, and dosimeters for volumetric modulated arc therapy (VMAT). Methods A total of 240 VMAT plans for various treatment sites, which were generated with Trilogy (140 plans) and TrueBeam STx (100 plans), were retrospectively selected. For each VMAT plan, planar dose distributions were measured with both MapCHECK2 and ArcCHECK dosimeters. During the planar dose distribution measurements, the actual multileaf collimator (MLC) positions, gantry angles, and delivered monitor units were recorded and compared to the values in the original VMAT plans to calculate mechanical errors. For each VMAT plan, both the global and local gamma analyses were performed with 3%/3 mm, 2%/2 mm, 2%/1 mm, 1%/2 mm, and 1%/1 mm. The Pearson correlation coefficients (r) were calculated 1) between the global and the local GPRs, 2) between GPRs with the MapCHECK2 and the ArcCHECK dosimeters, 3) and between GPRs and the mechanical errors during the VMAT delivery. Results For the MapCHECK2 measurements, strong correlations between the global and local GPRs were observed only with 1%/2 mm and 1%/1 mm (r > 0.8 with p 0.05), while the local GPRs showed moderate correlations only with 2%/1 mm and 1%/1 mm for TrueBeam STx (r > 0.5 with p |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1748-717X |
| Relation: | http://link.springer.com/article/10.1186/s13014-018-1123-x; https://doaj.org/toc/1748-717X |
| DOI: | 10.1186/s13014-018-1123-x |
| URL الوصول: | https://doaj.org/article/c78d3748366e4469a80a47f5b2cc704c |
| رقم الانضمام: | edsdoj.78d3748366e4469a80a47f5b2cc704c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder كن أول من يترك تعليقا!