[21p-W810-1~8] 2.1 Radiation physics and Detector fundamentals

[21p-W810-1] [Young Scientist Presentation Award Speech] Development of dosimetry technique for large-dose and high-resolution measurement of X-rays in microbeam radiation therapy

〇Go Okada¹, Jumpei Ueda², Setsuhisa Tanabe², Andy Edgar³, George Belev⁴, Takayuki Yanagida¹, Safa Kasap⁵ (1.NAIST, 2.Kyoto Univ., 3.VUW (NZ), 4.CLS (CAN), 5.USask (CAN))

Keywords:Dosimeter,Samarium,Microbeam radiation therapy

Microbeam Radiation Therapy (MRT) is a potential canther therapy using intese and high-energy synchrotron X-rays. The measurement of X-ray dose distirbution in MRT requires both dynamic range of 5-1000 Gy and a-few-micrometer resolution together; however, no existing detectors have been able to handle such high demanding requirements. In this study, we have developed a state-of-the-art technique using Sm-doped radiophotoluminescence (RPL) dosimeters, which relies on the Sm³⁺-to-Sm²⁺ interconversion associated with X-ray irradiation. With our new technique, we have successfully demonstrated accurate measurements of X-ray dose distribution in MRT.