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http://dx.doi.org/10.7742/jksr.2019.13.7.925

Evaluation of Dose Distribution of 6 MV X-ray using Optical Dosimetry  

Kim, Sunghwan (Department of Radiological Science, Cheongju University)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.7, 2019 , pp. 925-932 More about this Journal
Abstract
In this paper, we developed optical dosimetry system with a plastic scintillator, a commercial 50 mm, f1.8 lens, and a commercial high-sensitivity CMOS (complementary metal-oxide semiconductor) camera. And, the correction processors of vignetting, geometrical distortion and scaling were established. Using the developed system, we can measured a percent depth dose, a beam profile and a dose linearity for 6 MV medical LINAC (Linear Accelerator). As results, the optically measured percent depth dose was well matched with the measured percent depth dose by ion-chamber within 2% tolerance. And the determined flatness was 2.8%. We concluded that the optical dosimetry system was sufficient for application of absorbed dose monitoring during radiation therapy.
Keywords
Optical Dosimetry; Plastic Scintillator; CMOS Camera; Integral Dose; Percent Depth Dose;
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