Characterization of one-dimensional fiber-optic scintillating detector for electron beam therapy dosimetry

摘要

In this study, a one-dimensional fiber-optic scintillating detector is developed for electron beam therapy dosimetry. Each fiber-optic detector has an organic scintillator as a sensitive volume and it is embedded and arrayed in the plastic phantom to measure one-dimensional high energy electron beam profile of clinical linear accelerator (CLINAC). The scintillating lights generated from each detector probe are guided by plastic optical fibers to the photodiode array. The one-dimensional electron beam profiles in a plastic phantom are measured with different field sizes and energies of electron beam and the intensity of Cerenkov light which is generated from optical fiber is measured as a function of the incident angle of electron beam. Also, isodose and three-dimensional percent depth dose curves in a plastic phantom are obtained using a one-dimensional scintillating detector array with different electron beam energies.