Sang Hun SHIN¹, Wook Jae YOO¹, Jeong Ki SEO¹, Ki-Tek HAN¹, Dayeong JEON¹, Kyoung Won JANG¹, Hyeok In SIM¹, Seunghyun CHO², and Bongsoo LEE^1*

¹School of Biomedical Engineering, College of Biomedical and Health Science, Research Institute of Biomedical Engineering, Konkuk University, Chungju 380-701, Korea
²Department of Organic Materials and Fiber Engineering, College of Engineering, Soongsil University, Seoul 156-743, Korea

(Received August 14, 2012; Revised November 22, 2012; Accepted December 31, 2012)

We developed a scintillating fiber-optic image sensor system (SFISS) using square plastic optical fibers (POFs), a scintillating film, a right-angle mirror, and a complementary metal–oxide semiconductor (CMOS) image camera for dosimetry in radiotherapeutic applications. In this study, the scintillating light images were obtained for measuring two-dimensional planar dose distributions of a 6 MV photon beam in a solid–water phantom. We also measured the percentage depth doses (PDDs) of 6 and 15 MV photon beams using the SFISS and compared them with those obtained using conventional dosimetry films. The proposed sensor has many advantages, such as real-time readout, high-resolution measurement, and lack of corrections for temperature, pressure, and humidity. From the results of this study, it is expected that a SFISS can be developed to accurately measure the dose distribution in a small beam field for stereotactic radiosurgery (SRS).

Key words: fiber-optic image sensor, stereotactic radiosurgery, dosimetry, dose distribution, scintillating light image

^*E-mail address: bslee@kku.ac.kr