Dresden 2011 – scientific programme
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ST: Fachverband Strahlen- und Medizinphysik
ST 1: Radiation Therapy I Fast Ions: Production, Physical Dosimetry, Biological Effets, Medical Effects
ST 1.4: Talk
Monday, March 14, 2011, 14:45–15:00, POT 112
Uncertainty analysis of film dosimetry for ion beam therapy — •francis twumasi boateng1,2, peter steidl1, dirk müssig1, daniel richter1, alexander gemmel1,3, claus grupen2, marco durante1, and christoph bert1 — 1GSI, Darmstadt, Deutschland — 2Universität Siegen, Deutschland — 3Siemens AG, Healthcare, Erlangen, Deutschland
Radiographic films are well-established 2D dosimeters with excellent spatial resolution. Numerous publications discuss the different aspects of film dosimetry and its response to different radiation fields.
In this study, we performed several experiments to assess the uncertainties related to dosimetry with Kodak X-Omat V films in scanned ion beam therapy. The measured film response is potentially influenced by the condition of the developing machine, the time delay between irradiation and development, storage temperature, and the 2D densitometer. Since quantitative assessments in ion beam therapy are done against the modeled film response that is based on the photon response of the film, the study also included 60Co and linac based photon beam irradiation. We present and discuss intermediate results of this study.