Companding technique for high dynamic range measurements using gafchromic films

Abstract

We propose a methodology to perform dose measurements using gafchromic films which can span several decades of dose levels. The technique is based on a rescaling approach using different films irradiated at different dose levels. This is combined with a registration protocol correcting positioning and scaling factors for each film.

Preprint submitted to Medical Physics, 10 pages, 4 figures, 1 table