Compton based high sensitivity gamma imaging

Published : 1 January 2023

Emission imaging is a medical imaging modality using radiopharmaceuticals, enabling to retrieve functional information. It is highly specific and sensitive to very small concentrations of the tracer. However, current instruments like scintillation cameras measure only a small fraction of emitted photons. Positrons cameras are more sensitive but limited to beta+ emitters.

Recent improvements in the radiation detector field enable to estimate for each detected photon its interaction time, deposited energy and 3D interaction location. As a result, it makes possible to use Compton scattered events inside detection material. From them, one can know more on their incident direction and their polarization.

This is interesting because the photon pair resulting from positron anihilation have opposite directions and have orthogonal polarizations, with quantic entanglement.

The aim of this PhD work is to study and modelized these phenomena for simulate them, and then experimentaly validate the obtained results in order to imagine new tomographic imaging concepts.

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