title: Effects of Temperature and X-rays on Plastic Scintillating Fiber and Infrared Optical Fiber.
abstract: In this study, we have studied the effects of temperature and X-ray energy variations on the light output signals from two different fiber-optic sensors, a fiber-optic dosimeter (FOD) based on a BCF-12 as a plastic scintillating fiber (PSF) and a fiber-optic thermometer (FOT) using a silver halide optical fiber as an infrared optical fiber (IR fiber). During X-ray beam irradiation, the scintillating light and IR signals were measured simultaneously using a dosimeter probe of the FOD and a thermometer probe of the FOT. The probes were placed in a beaker with water on the center of a hotplate, under variation of the tube potential of a digital radiography system or the temperature of the water in the beaker. From the experimental results, in the case of the PSF, the scintillator light output at the given tube potential decreased as the temperature increased in the temperature range from 25 to 60 °C. We demonstrated that commonly used BCF-12 has a significant temperature dependence of -0.263 ± 0.028%/°C in the clinical temperature range. Next, in the case of the IR fiber, the intensity of the IR signal was almost uniform at each temperature regardless of the tube potential range from 50 to 150 kVp. Therefore, we also demonstrated that the X-ray beam with an energy range used in diagnostic radiology does not affect the IR signals transmitted via a silver halide optical fiber.
authors.affiliation: School of Biomedical Engineering, College of Biomedical & Health Science, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University, 268 Chungwon-daero, Chungju-si, Chungcheongbuk-do 380-701, Korea. bslee@kku.ac.kr.
authors.forename: Bongsoo
authors.initials: B
authors.lastname: Lee
authors.affiliation: School of Biomedical Engineering, College of Biomedical & Health Science, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University, 268 Chungwon-daero, Chungju-si, Chungcheongbuk-do 380-701, Korea. shshin9431@gmail.com.
authors.forename: Sang Hun
authors.initials: SH
authors.lastname: Shin
authors.affiliation: School of Biomedical Engineering, College of Biomedical & Health Science, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University, 268 Chungwon-daero, Chungju-si, Chungcheongbuk-do 380-701, Korea. kko988@kku.ac.kr.
authors.forename: Kyoung Won
authors.initials: KW
authors.lastname: Jang
authors.affiliation: School of Biomedical Engineering, College of Biomedical & Health Science, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University, 268 Chungwon-daero, Chungju-si, Chungcheongbuk-do 380-701, Korea. wonzip@kku.ac.kr.
authors.forename: Wook Jae
authors.initials: WJ
authors.lastname: Yoo
mesh_terms: D004867:Equipment Design; D008422:Materials Testing; D015233:Models, Statistical; D055100:Optical Fibers; D010969:Plastics / Q000737:chemistry* / Q000528:radiation effects*; D013696:Temperature; D014965:X-Rays
chemical_list: D010969:Plastics
keywords: X-ray; fiber-optic sensor; infrared optical fiber; plastic scintillating fiber; temperature