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1차원 광섬유 팬텀선량계를 이용한 치료용 광자선의 피부 및 선량보강영역에서 상대선량 측정
문진수 ( Jin Soo Kyoung ),장경원 ( Kyoung Won Jang ),유욱재 ( Wook Jae Yoo ),서정기 ( Jeong Ki Seo ),박장연 ( Jang Yeon Park ),이봉수 ( Bong Soo Lee ),조영호 ( Young Ho Cho ) 한국센서학회 2011 센서학회지 Vol.20 No.2
In this study, we fabricated a fiber-optic phantom dosimeter by arraying square type of plastic optical fibers in a PMMA phantom for measuring relative depth doses of therapeutic photon beams. To minimize the cross-talk between fiber-optic dosimeters, we selected appropriate septum by measuring leaked scintillating lights according to the various kinds of septa. In addition, we measured percentage depth doses of 6, 15 MV photon beams using a fiber-optic phantom dosimeter.
유욱재 ( Wook Jae Yoo ),서정기 ( Jeong Ki Seo ),장경원 ( Kyoung Won Jang ),문진수 ( Jin Soo Moon ),한기택 ( Ki Tek Han ),박장연 ( Jang Yeon Park ),이봉수 ( Bong Soo Lee ),조승현 ( Seung Hyun Cho ),허지연 ( Ji Yeon Heo ),박병기 ( B 한국센서학회 2011 센서학회지 Vol.20 No.4
A reflection-type fiber-optic pH sensor, which is composed of a pH sol-gel film, plastic optical fibers, a mirror, a light source and a spectrometer, is developed in this study. As pH indicators, a bromthymol blue, a cresol red and a thymol blue are used, and they are immobilized in the sol-gel films. The emitted light from a light source is guided by a fiber-optic Y-coupler and plastic optical fibers to the pH sol-gel film in a pH sensing probe. The pH change in the sensing probe gives rise to a change in the color of the pH sol-gel film, and the optical characteristic of reflected light through the pH sol-gel film is also changed. Therefore, we have measured the spectra of reflected lights, which are changed according to the color variations of the pH sol-gel films with different pH values, by using of a spectrometer. Also, the relationships between the pH values and the intensities of reflected lights are obtained on the basis of the color variations of the pH sol-gel films.