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Optimizing the Dynamic Range Extension of a Radiochromic Film Dosimetry System



Slobodan Devic, Tomic Nada, Christopher G. Soares, Ervin Podgorsak


We present a radiochromic film dosimetry protocol for a multi-color channel radiochromic film dosimetry system consisting for the EBT model GAFCHROMIC(TM) film and the Epson Expression 1680 flat-bed document scanner. Instead of extracting only the red color channel, we are using all three channels in the absorption spetrum 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 we obtained a system that has both precision and accuracy below 1.5%, and the optimized ranges are 0 to 4 Gy for the red channel, 4 Gy to 50 Gy for the green channel, and above 50 Gy for the blue channel.
Medical Physics


flat-bed canner, radiochromic film dosimetry, uncertainty analysis, sensitivity curves


Devic, S. , Nada, T. , Soares, C. and Podgorsak, E. (2009), Optimizing the Dynamic Range Extension of a Radiochromic Film Dosimetry System, Medical Physics, [online], (Accessed April 15, 2024)
Created February 27, 2009, Updated October 12, 2021