医疗卫生装备2012，Vol.33Issue(11)：117-118,121,3.
Varian 23EX加速器低MU对X射线剂量学影响的研究
Dosimetry Influence of X-Ray Generated from Varian 23EX Accelerator with Low Monitor Unit
摘要
Abstract
Objective To discuss the dosimetry influence of X-ray generated from Varian 23EX accelerator with low monitor unit. Methods The output dose rate was set as 300 MU/min with X-ray of Varian 23EX accelerator. X-ray of 6 and 15 MV were calibrated, then absorbed doses of low monitor unit(l~10 MU) were measured and compared with corresponding ones. The influence on start-up characteristics of accelerator with 6 and 15 MV was analyzed. Radiation quality(D20/D10) of low monitor unit was measured and compared with D20/D10 by conventional measure; percent depth dose(PDD) of low monitor unit was measured and compared with that of conventional measure. Results The influence on absorbed dose of X-ray was great at low monitor unit, with the maximum error of -11.00%; the influence on D20/D10 PDD was little, with the maximum error of 0.340% and 0.483%. Conchusion The influence on absorbed dose of the accelerator with low monitor unit from different factories and with different models and output dose rates has to be examined periodically.关键词
加速器/MU/X射线/剂量学Key words
accelerator, monitor unit/ X-ray/ dosimetry分类
医药卫生引用本文复制引用
曾自力,林锋,王勇兵..Varian 23EX加速器低MU对X射线剂量学影响的研究[J].医疗卫生装备,2012,33(11):117-118,121,3.基金项目
广西医疗卫生科学研究项目(Z2011241) （Z2011241）
