Modeling and Simulations on Scattered Gamma-Ray Imaging without Collimator

摘要

Scattered radiation by Compton effect in emission imaging has been considered increasingly as active agent instead of being treated as noise and being rejected. In a recent proposal, scattered radiation emitted by the object under investigation and detected by a collimated gamma camera was shown to provide the capability to reconstruct the object in three dimensions. The acquisition of the scattered radiation with an uncollimated detector would enhance drastically sensitivity and resolution. This paper proposes a formal model for the image formation in this new imaging process. Monte-Carlo simulations validate the forward model and are used as data for numerical reconstruction.