光激發光劑量計與游離腔在高能直線加速器劑量輸出驗證比較

The Output Dose Calibration of Optically Stimulated Luminescence Dosimeter and Ionization Chamber for High-Energy Linear Accelerator

黃椲茗(Wei-Ming Huang)；林招膨(Jao-Perng Lin)；黃冠樺(Guan-Hua Huang)；林俊良(Jiunn-Liang Lin)；黃慶順(Ching-Shun Huang)

光激發光劑量計 ； 游離腔 ； 劑量輸出 ； 直線加速器 ； OSLD ； Ion Chamber ； Output Dose ； Linear Accelerator

台灣應用輻射與同位素雜誌

11卷2期（2015 / 06 / 01）

1123 - 1129

繁體中文

本研究以光激發光劑量計（Optically Stimulated Luminescence Dosimeter；OSLD）作為高能直線加速器吸收劑量輸出量測，比較美國醫學物理學會（AAPM）之TG-21號報告游離腔輸出之劑量差異。以高能直線加速器6MV、10MV光子射束及五種不同能量之電子射束將OSLD與游離腔在相同深度及條件做度量，比較光激發光劑量計與游離腔在監控單位之輸出結果並探討其準確度。結果顯示兩著誤差小於3%，由此可知光激發光劑量計日後可作為臨床量測劑量之用，它具有良好能量依存性、劑量線性度，讀值再現性及方便性之特性。

In this study, we use the optically stimulated luminescence dosimeter (OSLD) as the absorbed dose of high-energy linear accelerator output dose measurement, and compare the report of the American Association of Physicists in Medicine (AAPM) TG-21, dose difference of ion chamber output. Measuring the output dose of OSLD and ion chamber in the same depth and condition for a high-energy linear accelerator equipped with 6 MV, 10MV photon beam and other electron beam. Compare OSLD with ion chamber in the output result and discuss accuracy. The result showed the error less than 3%. OSLD will be applied to clinical measurement in the future, and it has well characteristic of energy dependence, dose linearity, reproducibility as well as convenient.