[2N17-21] Medical Application/Applied Measurement

[2N17] Observation of 3D-Dose Distribution of 3D-Gel Dosimeters Irradiatted by Carbon Ion Beam

*Masumitsu Toyohara¹, Hiroaki Gotoh¹, Maiko Mihashi¹, Kazuya Hayashi¹, Kyosuke Tadano¹, Shinichi Minohara², Yoshiaki Shimono³, Shinya Miyamoto³ (1. Yokohama National University, 2. Kanagawa Cancer Center, 3. TOshiba Energy Systems & Solutions Corp.)

Keywords:Heavy Ion Particle, Gel Dosimeter, Absorption Energy, Optical Computed Tomography, Color Gel, Polymer Gel, PVA-KI Gel

3-D dose distribution of color gel dosimeter, PVA-KI gel dosimeter and polymer gel dosimeter irradiated by 12^C^6+ beam were measured using optical computed tomography. Measured 3-D dose distribution of color gel dosimeter and PVA-KI gel dosimeter coincided with the dose distribution planed by treatment plan beforehand. On the other hand, measured 3-D dose distribution of polymer gel dosimeter in the vicinity of Bragg peak didn’t coincided with the predicted distribution due to the artifact.