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Fiber optic radioluminescent probes for radiation therapy dosimetry
Author(s): Arash Darafsheh
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Paper Abstract

Radioluminescent fiber optic dosimeters have drawn great attention due to their unique practical advantageous properties including the ability to perform in vivo, real-time, and intracavity measurements with high spatial resolution due to their small physical size and mechanical flexibility. These features make them ideal candidates for many potential applications in radiation therapy dosimetry, such as in brachytherapy, intensity-modulated radiation therapy, superficial therapy, stereotactic radiosurgery, proton therapy, and small-field dosimetry. However, in therapeutic radiation fields, the total optical signal carried by the fiber has undesirable components in addition to the useful radioluminescent signal. The main problem with fiber optic dosimeters in photon and electron therapies is these undesirable signals that are primarily the Čerenkov radiation generated in the irradiated portion of the guide fiber. Another significant issue related to scintillation fiber optic dosimetry that occurs in proton therapy and other beams with high linear energy transfer (LET) is the non-proportionality between the scintillation signal and the proton dose due to the ionization quenching. In this work, recent progress toward minimizing the impact of Čerenkov radiation and ionization quenching through using spectroscopic methods, specialty fiber optics, and undoped fibers is briefly reviewed.

Paper Details

Date Published: 27 February 2019
PDF: 11 pages
Proc. SPIE 10872, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX, 108720Q (27 February 2019); doi: 10.1117/12.2510398
Show Author Affiliations
Arash Darafsheh, Washington Univ. School of Medicine in St. Louis (United States)

Published in SPIE Proceedings Vol. 10872:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIX
Israel Gannot, Editor(s)

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