Phosphor-based fiber optic microprobes for ionizing beam radiation dosimetry

Arash Darafsheh; Haoyang Liu; Stan Najmr; Michael Tenuto; Christopher B. Murray; Joseph S. Friedberg; Timothy C Zhu; Jarod C. Finlay

doi:10.1117/12.2078021

11 March 2015 Phosphor-based fiber optic microprobes for ionizing beam radiation dosimetry

Arash Darafsheh, Haoyang Liu, Stan Najmr, Michael Tenuto, Christopher B. Murray, Joseph S. Friedberg, Timothy C Zhu, Jarod C. Finlay

Author Affiliations +

Proceedings Volume 9317, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV; 93170R (2015) https://doi.org/10.1117/12.2078021
Event: SPIE BiOS, 2015, San Francisco, California, United States

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.

Citation Download Citation

Arash Darafsheh, Haoyang Liu, Stan Najmr, Michael Tenuto, Christopher B. Murray, Joseph S. Friedberg, Timothy C Zhu, and Jarod C. Finlay "Phosphor-based fiber optic microprobes for ionizing beam radiation dosimetry", Proc. SPIE 9317, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV, 93170R (11 March 2015); https://doi.org/10.1117/12.2078021

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