Optimizing the dynamic range extension of a radiochromic film dosimetry system

Journal Article · Sun Feb 15 04:00:00 EST 2009 · Medical Physics

DOI:https://doi.org/10.1118/1.3049597· OSTI ID:22098427

Devic, Slobodan; Tomic, Nada; Soares, Christopher G.; Podgorsak, Ervin B. ^[1]

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1. Medical Physics Department, McGill University Health Centre, Montreal, Quebec H3G 1A4 (Canada)

The authors present a radiochromic film dosimetry protocol for a multicolor channel radiochromic film dosimetry system consisting of the external beam therapy (EBT) model GAFCHROMIC film and the Epson Expression 1680 flat-bed document scanner. Instead of extracting only the red color channel, the authors are using all three color channels in the absorption spectrum of the EBT film to extend the dynamic dose range of the radiochromic film dosimetry system. By optimizing the dose range for each color channel, they obtained a system that has both precision and accuracy below 1.5%, and the optimized ranges are 0-4 Gy for the red channel, 4-50 Gy for the green channel, and above 50 Gy for the blue channel.

• OSTI ID: 22098427
• Journal Information: Medical Physics, Journal Name: Medical Physics Journal Issue: 2 Vol. 36; ISSN 0094-2405; ISSN MPHYA6
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
ABSORPTION SPECTRA
ACCURACY
COLOR
FILM DOSIMETRY
OPTIMIZATION
RADIOTHERAPY