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Proceedings Paper

Fiber optic probes based on silver-only coated hollow glass waveguides for ionizing beam radiation dosimetry
Author(s): Arash Darafsheh; Haoyang Liu; Jeffrey E. Melzer; Reza Taleei; James A. Harrington; Alireza Kassaee; Timothy C. Zhu; Jarod C. Finlay
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Paper Abstract

Čerenkov contamination is a significant issue in radiation detection by fiber-coupled scintillators. To enhance the scintillation signal transmission while minimizing Čerenkov contamination, we designed a fiber probe using a silver-only coated hollow waveguide (HWG). The HWG tip with inserted scintillator, embedded in tissue mimicking phantoms, was irradiated with clinical electron and photon beams. Optical spectra of irradiated tips were taken using a fiber spectrometer, and the signal was deconvolved with a linear fitting algorithm. The resultant decomposed spectra of the scintillator with and without Čerenkov correction were in good agreement with measurements performed by an electron diode and ion chamber for electron and photon beam dosimetry, respectively, indicating the minimal effect of Čerenkov contamination. Compared with a silver/dielectric coated HWG fiber dosimeter design we observed higher signal transmission in our design based on the use of silver-only HWG.

Paper Details

Date Published: 7 March 2016
PDF: 9 pages
Proc. SPIE 9702, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVI, 970210 (7 March 2016); doi: 10.1117/12.2211424
Show Author Affiliations
Arash Darafsheh, Univ. of Pennsylvania (United States)
Haoyang Liu, Univ. of Pennsylvania (United States)
Jeffrey E. Melzer, Rutgers Univ. (United States)
Reza Taleei, UT Southwestern Medical Ctr. (United States)
James A. Harrington, Rutgers Univ. (United States)
Alireza Kassaee, Univ. of Pennsylvania (United States)
Timothy C. Zhu, Univ. of Pennsylvania (United States)
Jarod C. Finlay, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 9702:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVI
Israel Gannot, Editor(s)

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