Water-equivalent one-dimensional scintillating fiber-optic dosimeter for measuring therapeutic photon beam

In this study, we fabricated a one-dimensional scintillating fiber-optic dosimeter, which consists of 9 scintillating fiber-optic dosimeters, septa, and PMMA blocks for measuring surface and percentage depth doses of a therapeutic photon beam. Each dosimeter embedded in the 1-D scintillating fiber-optic dosimeter is composed of square type organic scintillators and plastic optical fibers. Also black PVC films are used as septa to minimize cross-talk between the scintillating fiber-optic dosimeters. To construct a dosimeter system, a 1-D scintillating fiber-optic dosimeter and a CMOS image sensor were combined with 20 m-length plastic optical fibers. Using the dosimeter system, we measured surface and percentage depth doses of 6 and 15 MV photon beams and compared the results with those of EBT films and an ionization chamber.

► Fabrication of a one-dimensional scintillating fiber-optic dosimeter.
► The one-dimensional scintillating fiber-optic dosimeter has 9 scintillating fiber-optic dosimeters.
► Measurements of surface and percentage depth doses of a therapeutic photon beam.
► The results were compared with those of EBT films and an ionization chamber.