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Proceedings Paper

Optical spectral analysis of radiochromic films irradiated with radiation therapy beams
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Paper Abstract

Radiochromic films, owing to their high spatial resolution, are well-suited for radiation therapy dosimetry and quality assurance purposes. However, their spectroscopic response to radiotherapy beams has not been comprehensively investigated, except for a limited subset of beam qualities. In this work, we explore the spectral response of the EBT3 and EBT-XD radiochromic film models to different clinical radiation beam qualities including photons and protons. The spectral response of EBT3 and EBT-XD films showed two peaks at 585 nm and 635 nm for both photon and proton irradiation. Beyond a certain batch- and model-dependent dose threshold a saturation behavior was observed in the primary absorption peak. For beam qualities studied in this work, the spectral response of proton-irradiated films showed a systematic under-response compared to their photon-irradiated counterparts in both EBT-3 and EBTXD radiochromic films models.

Paper Details

Date Published: 17 February 2020
PDF: 6 pages
Proc. SPIE 11231, Design and Quality for Biomedical Technologies XIII, 112310I (17 February 2020); doi: 10.1117/12.2545272
Show Author Affiliations
Arash Darafsheh, Washington Univ. School of Medicine in St. Louis (United States)
Tianyu Zhao, Washington Univ. School of Medicine in St. Louis (United States)
Rao Khan, Washington Univ. School of Medicine in St. Louis (United States)


Published in SPIE Proceedings Vol. 11231:
Design and Quality for Biomedical Technologies XIII
Jeeseong Hwang; Gracie Vargas, Editor(s)

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