Abstract Radiochromic film is widely recognised as an easy-to-use, high-resolution dosimeter, but accurate, consistent, and reliable film readout remains an ongoing challenge. In this work, we compare three different radiochromic film imaging systems: a conventional flatbed scanner, and two systems that were custom built in-house (a diffuse light field and camera system, and a scanning point source and detector system). We examine key optical properties and imaging parameters to determine the strengths and weaknesses of each imaging system. In particular, we characterize the limitations on the diffuse light field system (due to stray light effects) and show that, using a collimated point source, accurate film results can be obtained for any field size irradiation free of stray light effects.
Alexander et al. (Thu,) studied this question.
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