Presentation Charged particle imaging: comparison between different particles

Cecile, Bopp  ,  Brasse, D.  ,  Matsufuji, Naruhiro

2016-11-02
Description
Charged particle radiography and tomography are being developed for range verification and treatment planning purposes in the context of hadron therapy. Lighter charged particles, such as protons, present some advantages in terms of dose deposit with regard to the achievable resolution on the stopping power in reconstructed images. However, they are also more subject to multiple scattering, leading to a degradation of the spatial resolution.This is a great drawback, but can be somewhat lessened in the context of tomographic image recon- struction by making use of a detection system recording particle- by-particle information and accounting for the trajectory of each particle. Through Monte Carlo simulations of charged particle computed tomography scan data, this study aims at illustrating and quantifying the trade-offs in terms of dose, spatial resolution and stopping power resolution in the case of proton, helium, carbon and oxygen particles at different energies. In order to evaluate the advantage of single particle tracking, which puts challenging requirements on the detection system of a scanner, images reconstructed using algorithms accounting for the most likely path and not accounting for it will be compared for each particle type.
IEEE Nuclear Science Symposium 2016 (NSS)/The Medical Imaging Conference (MIC) (2016 IEEE NSS/MIC)

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