A linear relationship for the LET-dependence of Gafchromic EBT3 film in spot-scanning proton therapy
Abstract
Radiochromic film (RCF) is a valuable dosimetric tool, primarily due to its sub-millimeter spatial resolution. For accurate proton dosimetry, the dependence of film response on linear energy transfer (LET) must be characterized and calibrated. In this work, we characterized film under-response, or 'quenching', as a function of dose-weighted linear energy transfer (LETd) in several proton fields and established a simple, linear relationship with LETd.
- Publication:
-
Physics in Medicine and Biology
- Pub Date:
- March 2019
- DOI:
- 10.1088/1361-6560/ab0114
- Bibcode:
- 2019PMB....64e5015A
- Keywords:
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- film;
- LET;
- proton therapy;
- dosimetry