Application of independent three-dimensional dose verification for volumetric modulated arc therapy of nasopharyngeal carcinoma(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2021年第11期
- Page:
- 1359-1364
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Application of independent three-dimensional dose verification for volumetric modulated arc therapy of nasopharyngeal carcinoma
- Author(s):
- LIU Zhibin; SHI Jinping; LI Yinghui; ZHANG Liwen; XIE Qiuying; TENG Jianjian; CHANG Yuanzhi
- Department of Radiation Physics, the First Peoples Hospital of Foshan (Affiliated Foshan Hospital of Sun Yat-sen University), Foshan 528000, China
- Keywords:
- Keywords: nasopharyngeal carcinoma volumetric modulated arc therapy Bland-Altman analysis receiver operating characteristic curve optimal threshold
- PACS:
- R811.1；R737.33
- DOI:
- DOI:10.3969/j.issn.1005-202X.2021.11.008
- Abstract:
- Abstract: Objective To explore the feasibility of independent three-dimensional dose verification for volumetric modulated arc therapy (VMAT) of nasopharyngeal carcinoma (NPC).?ethods The VMAT plans of 31 NPC patients were selected. Bland-Altman method was used to analyze the consistency between independent three-dimensional dose distribution and measured reconstructed three-dimensional dose distribution, so as to demonstrate the feasibility of independent three-dimensional dose verification for VMAT of NPC. Based on the dose-volume histogram of independent three-dimensional dose verification and the classification of gamma passing rate, receiver operating characteristic (ROC) curve was drawn, and the optimal gamma passing rate threshold of independent three-dimensional dose verification for VMAT of NPC was obtained.?esults For two verification methods for VMAT of NPC, 95.34% of the test points were within the consistency range, indicating there was a good consistency between the two verification methods. According to ROC curve and AUC value, PTV2 was selected as the best evaluation of gamma passing rate in the independent three-dimensional dose verification for VMAT of NPC, and its optimal threshold was 95.41%.?onclusion Independent three-dimensional dose verification can be used as a test of the calculation accuracy of the planning system, and the pretreatment planning can be verified quickly.?he optimal threshold is helpful to screen the radiotherapy plan and provides a safe and effective technical guarantee for the accurate implementation of radiotherapy plan.
Last Update: 2021-11-27