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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 13 — Jun. 18, 2012
  • pp: 13907–13914

Fiber-optic Cerenkov radiation sensor for proton therapy dosimetry

Kyoung Won Jang, Wook Jae Yoo, Sang Hun Shin, Dongho Shin, and Bongsoo Lee  »View Author Affiliations


Optics Express, Vol. 20, Issue 13, pp. 13907-13914 (2012)
http://dx.doi.org/10.1364/OE.20.013907


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Abstract

In proton therapy dosimetry, a fiber-optic radiation sensor incorporating a scintillator must undergo complicated correction processes due to the quenching effect of the scintillator. To overcome the drawbacks of the fiber-optic radiation sensor, we proposed an innovative method using the Cerenkov radiation generated in plastic optical fibers. In this study, we fabricated a fiber-optic Cerenkov radiation sensor without an organic scintillator to measure Cerenkov radiation induced by therapeutic proton beams. Bragg peaks and spread-out Bragg peaks of proton beams were measured using the fiber-optic Cerenkov radiation sensor and the results were compared with those of an ionization chamber and a fiber-optic radiation sensor incorporating an organic scintillator. From the results, we could obtain the Bragg peak and the spread-out Bragg peak of proton beams without quenching effects induced by the scintillator, and these results were in good agreement with those of the ionization chamber. We also measured the Cerenkov radiation generated from the fiber-optic Cerenkov radiation sensor as a function of the dose rate of the proton beam.

© 2012 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(350.5610) Other areas of optics : Radiation
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Sensors

History
Original Manuscript: March 21, 2012
Revised Manuscript: April 26, 2012
Manuscript Accepted: April 26, 2012
Published: June 7, 2012

Virtual Issues
Vol. 7, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Kyoung Won Jang, Wook Jae Yoo, Sang Hun Shin, Dongho Shin, and Bongsoo Lee, "Fiber-optic Cerenkov radiation sensor for proton therapy dosimetry," Opt. Express 20, 13907-13914 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-13-13907


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