Phosphor-based fiberoptic 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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

16 Scopus citations

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 .erenkov 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.

Original languageEnglish
Title of host publicationOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV
EditorsIsrael Gannot
PublisherSPIE
ISBN (Electronic)9781628414073
DOIs
StatePublished - 2015
EventOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV - San Francisco, United States
Duration: Feb 7 2015Feb 8 2015

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume9317
ISSN (Print)1605-7422

Conference

ConferenceOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XV
Country/TerritoryUnited States
CitySan Francisco
Period02/7/1502/8/15

Keywords

  • Dosimetry
  • Fiber optic
  • Ionizing radiation
  • Phosphor
  • Spectroscopy
  • Terbium
  • ěrenkov radiation

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