Abstract
In this study, we have developed two-dimensional fiber-optic radiation sensors using organic scintillators and plastic optical fibers for high energy photon beam therapy dosimetry. The scintillating lights generated from each organic sensor probe embedded and arrayed in a polymethylmethacrylate phantom are guided by 10 m plastic optical fibers to the light-measuring devices such as 25 channel photodiode-amplifiers system. Two-dimensional photon beam distributions in a polymethylmethacrylate phantom are measured with different energies and field sizes of photon beam. Also, percent depth dose curves for 6 and 15 MV photon beams are obtained using a two-dimensional fiber-optic sensor. This sensor has many advantages such as high resolution, real-time measurement, two-dimensional dose measurement and ease calibration over conventional radiation measurement devices.
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