Next Article in Journal
Next Article in Special Issue
Previous Article in Journal
Previous Article in Special Issue
Sensors 2014, 14(4), 7013-7025; doi:10.3390/s140407013
Article

Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber

1
, 1
, 1
, 1
, 1
, 2
 and 1,*
Received: 31 December 2013; in revised form: 18 March 2014 / Accepted: 15 April 2014 / Published: 21 April 2014
View Full-Text   |   Download PDF [414 KB, uploaded 21 June 2014]
Abstract: In this study, a wavelength shifting fiber that shifts ultra-violet and blue light to green light was employed as a sensor probe of a fiber-optic Cerenkov radiation sensor. In order to characterize Cerenkov radiation generated in the developed wavelength shifting fiber and a plastic optical fiber, spectra and intensities of Cerenkov radiation were measured with a spectrometer. The spectral peaks of light outputs from the wavelength shifting fiber and the plastic optical fiber were measured at wavelengths of 500 and 510 nm, respectively, and the intensity of transmitted light output of the wavelength shifting fiber was 22.2 times higher than that of the plastic optical fiber. Also, electron fluxes and total energy depositions of gamma-ray beams generated from a Co-60 therapy unit were calculated according to water depths using the Monte Carlo N-particle transport code. The relationship between the fluxes of electrons over the Cerenkov threshold energy and the energy depositions of gamma-ray beams from the Co-60 unit is a near-identity function. Finally, percentage depth doses for the gamma-ray beams were obtained using the fiber-optic Cerenkov radiation sensor, and the results were compared with those obtained by an ionization chamber. The average dose difference between the results of the fiber-optic Cerenkov radiation sensor and those of the ionization chamber was about 2.09%.
Keywords: Cerenkov radiation; wavelength shifting fiber; fiber-optic radiation sensor; radiation therapy Cerenkov radiation; wavelength shifting fiber; fiber-optic radiation sensor; radiation therapy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Jang, K.W.; Shin, S.H.; Kim, S.G.; Kim, J.S.; Yoo, W.J.; Ji, Y.H.; Lee, B. Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber. Sensors 2014, 14, 7013-7025.

AMA Style

Jang KW, Shin SH, Kim SG, Kim JS, Yoo WJ, Ji YH, Lee B. Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber. Sensors. 2014; 14(4):7013-7025.

Chicago/Turabian Style

Jang, Kyoung W.; Shin, Sang H.; Kim, Seon G.; Kim, Jae S.; Yoo, Wook J.; Ji, Young H.; Lee, Bongsoo. 2014. "Measurement of Cerenkov Radiation Induced by the Gamma-Rays of Co-60 Therapy Units Using Wavelength Shifting Fiber." Sensors 14, no. 4: 7013-7025.



Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert