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Feasibility of Ultra-Thin Fiber-Optic Dosimeters for Radiotherapy Dosimetry
Bongsoo Lee, 1 Guwon Kwon, 1 Sang Hun Shin 1 , Jaeseok Kim, 1 Wook Jae Yoo, 1 Young Hoon Ji, 2 Kyoung Won Jang, 1 Vittorio M. N. Passaro
1  School of Biomedical Engineering, College of Biomedical & Health Science, BK21 Plus Research Institute of Biomedical Engineering, Konkuk University, 322 Danwol-dong, Chungju-si, Chungcheongbuk-do 380-701, Korea; s:(B.L.);(G.K);(S.H.S.);(J.K.);(W.J.Y.)
2  Research Center for Radiotherapy, Korea Institute of Radiological and Medical Sciences, 215-4, Gongneung-dong, Nowon-gu, Seoul 139-706, Korea

Published: 17 November 2015 by MDPI in Sensors
MDPI, Volume 15; 10.3390/s151129003
Abstract: In this study, prototype ultra-thin fiber-optic dosimeters were fabricated using organic scintillators, wavelength shifting fibers, and plastic optical fibers. The sensor probes of the ultra-thin fiber-optic dosimeters consisted of very thin organic scintillators with thicknesses of 100, 150 and 200 μm. These types of sensors cannot only be used to measure skin or surface doses but also provide depth dose measurements with high spatial resolution. With the ultra-thin fiber-optic dosimeters, surface doses for gamma rays generated from a Co-60 therapy machine were measured. Additionally, percentage depth doses in the build-up regions were obtained by using the ultra-thin fiber-optic dosimeters, and the results were compared with those of external beam therapy films and a conventional fiber-optic dosimeter.
Keywords: fiber-optic sensors, Radiation Dosimeter, Co-60, radiation therapy
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