Comparison of dosimeter response: ionization chamber, TLD, and Gafchromic EBT2 film in 3D-CRT, IMRT, and SBRT techniques for lung cancer

13th South-East Asian Congress of Medical Physics 2015

物理学;医药卫生

Fitriandini, A.^1 ; Wibowo, W.E.^2 ; Pawiro, S.A.^1

Department of Physics, Faculty of Mathematics and Natural Sciences, University of Indonesia, Depok, Indonesia^1

Department of Radiotherapy, RSUPN Cipto Mangunkusumo, Jakarta, Indonesia^2

关键词: Accuracy and precision;    Dose measurement;    Dose verification;    Lung Cancer;    Measuring points;    Single fractions;    Thorax phantom;    Volume-averaging;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/694/1/012006/pdf
DOI  :  10.1088/1742-6596/694/1/012006

学科分类：卫生学

来源: IOP

【 摘 要 】

This research was conducted by measuring point dose in the target area (lungs), heart, and spine using four dosimeters (PTW N30013, Exradin A16, TLD, and the Gafchromic EBT2 film). The measurement was performed in CIRS 002LFC thorax phantom. The main objective of this study was to compare the dosimetry of those different systems. Dose measurements performed only in a single fraction of irradiation. The measurements result shown that TLD has the least accuracy and precision. As the effect of volume averaging, ionization chamber reaches the discrepancy value up to -13.30% in the target area. EBT2 film has discrepancy value of