Establishment of daily quality assurance program and analysis of dosimetric characteristics’ long- term stability for mobile intraoperative radiation therapy accelerator

VernacularTitle:移动式电子束术中放疗系统日常质量保证程序的建立及剂量参数稳定性分析
Author: Junqi WANG ; Jinli MA ; Weigang HU ; Lining SUN
Publication Type:Journal Article
Keywords: Intraoperative radiation therapy; Quality assurance; Long-term stability
From: China Oncology 2014;(1):52-56
CountryChina
Language:Chinese
Abstract: Background and purpose: Currently, intraoperative radiation therapy (IORT) has become the adjuvant therapy of cancer. The study was to establish the daily quality assurance (QA) program and analyze dosimetric characteristics’ long-term stability for mobile IORT accelerator. Methods:The QA program of this study included two parts:safety and functionality and energy and output. The two years’ QA datasets were acquired and analyzed to investigate the stability of energy and output. Results:All safety and functionality tests passed on a daily basis. The energy index was (0.666±0.015)mm, (0.839±0.009)mm, (0.781±0.010)mm, (0.724±0.009)mm and the output dose error was (0.511 ± 0.671)%, (0.278 ± 0.516)%, (0.368 ± 0.532)%, (0.382 ± 0.912)%for all energy, respectively. There was no signiifcant time trend in the dosimetric characteristics. Conclusion:The daily QA program is suitable for mobile IORT accelerator. The long-term stability is acceptable for IORT in clinical use.