[7a-N103-1~10] 2.4 Life Sciences, Medical applications, Space and Earth Environment, Radiation Education

9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[7a-N103-4] Development of a TOFPET2 ASIC-based SEB camera for particle therapy beam imaging

〇Mitsutaka Yamaguchi¹, Yuto Nagao¹, Michiko Tsuda^1,2, Han Gyu Kang¹, Takuya Yabe¹, Eiji Yoshida¹, Taiga Yamaya¹, Makoto Sakai³, Mutsumi Tashiro⁴, Yong-Gen Yin¹, Tomihiro Kamiya¹, Hiroshi Watabe², Naoki Kawachi¹ (1.QST, 2.Tohoku Univ., 3.Kyushu Univ., 4.Gunma Univ.)

Keywords:

secondary electron bremsstrahlung,particle therapy,imaging

Accurate visualization of beam range and trajectory in particle therapy is essential for detecting misalignment in the irradiation position and improving treatment precision. In this study, we developed a non-invasive beam imaging system using secondary electron bremsstrahlung (SEB), combining a TOFPET2 ASIC with a segmented GAGG:Ce scintillator in a pinhole X-ray camera. Experiments at Gunma University confirmed changes in beam projection images depending on degrader thickness, time resolution sufficient to resolve ~5 ms structures, and high count-rate performance exceeding 30 kcps.