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Proceedings Paper

Phosphor-based fiber optic microprobes for ionizing beam radiation dosimetry
Author(s): Arash Darafsheh; Haoyang Liu; Stan Najmr; Michael Tenuto; Christopher B. Murray; Joseph S. Friedberg; Timothy C Zhu; Jarod C. Finlay
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Paper Abstract

We have designed, fabricated, and characterized a fiberoptic probe composed of terbium-based phosphors for ionizing radiation dosimetry. Fiber optic probes consisting of ~1 mm layer of TbF3 covering the tip embedded in tissue-mimicking phantoms were irradiated with electron beams produced by a medical linear accelerator. Optical spectra of irradiated tips were taken using a fiber spectrometer. The luminescence signal from the phosphors was spectrally separated from the Čerenkov radiation generated in the fiber. In order to obtain the percent depth dose curve, the resultant decomposed spectra corresponding to the emission from the phosphors were considered as a measure of the absorbed dose. The measured depth dose curves using our fiber probes are in agreement with measurements performed by an electron diode, indicating the feasibility of using such fiber probes for ionizing radiation dosimetry.

Paper Details

Date Published: 11 March 2015
PDF: 6 pages
Proc. SPIE 9317, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV, 93170R (11 March 2015); doi: 10.1117/12.2078021
Show Author Affiliations
Arash Darafsheh, Univ. of Pennsylvania (United States)
Haoyang Liu, Univ. of Pennsylvania (United States)
Stan Najmr, Univ. of Pennsylvania (United States)
Michael Tenuto, Univ. of Pennsylvania (United States)
Christopher B. Murray, Univ. of Pennsylvania (United States)
Joseph S. Friedberg, Univ. of Maryland School of Medicine (United States)
Timothy C Zhu, Univ. of Pennsylvania (United States)
Jarod C. Finlay, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 9317:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV
Israel Gannot, Editor(s)

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