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An advanced image processing method to improve the spatial resolution of ion radiographies

2015; IOP Publishing; Volume: 60; Issue: 21 Linguagem: Inglês

10.1088/0031-9155/60/21/8525

1361-6560

Nils Krah, M Testa, Stephan Brons, Oliver Jäkel, Katia Parodi, B. Voss, Ilaria Rinaldi,

Radiation Detection and Scintillator Technologies

We present an optimization method to improve the spatial resolution and the water equivalent thickness (WET) accuracy of ion radiographies. The method is designed for imaging systems measuring for each actively scanned beam spot the lateral position of the pencil beam and at the same time the Bragg curve (behind the target) in discrete steps without relying on tracker detectors to determine the ion trajectory before and after the irradiated volume. Specifically, the method was used for an imaging set-up consisting of a stack of 61 parallel-plate ionization chambers (PPIC) interleaved with absorber plates of polymethyl methacrylate (PMMA) working as a range telescope.