Study and comparison of different sensitivity models for a two-plane Compton camera

Physics in Medicine and Biology
Enrique MuñozJ F Oliver

Abstract

Given the strong variations in the sensitivity of Compton cameras for the detection of events originating from different points in the field of view (FoV), sensitivity correction is often necessary in Compton image reconstruction. Several approaches for the calculation of the sensitivity matrix have been proposed in the literature. While most of these models are easily implemented and can be useful in many cases, they usually assume high angular coverage over the scattered photon, which is not the case for our prototype. In this work, we have derived an analytical model that allows us to calculate a detailed sensitivity matrix, which has been compared to other sensitivity models in the literature. Specifically, the proposed model describes the probability of measuring a useful event in a two-plane Compton camera, including the most relevant physical processes involved. The model has been used to obtain an expression for the system and sensitivity matrices for iterative image reconstruction. These matrices have been validated taking Monte Carlo simulations as a reference. In order to study the impact of the sensitivity, images reconstructed with our sensitivity model and with other models have been compared. Images have been rec...Continue Reading

References

Nov 24, 2004·Physics in Medicine and Biology·S JanC Morel
Jan 3, 2009·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·John P SullivanMohini W Rawool-Sullivan
Apr 28, 2016·Physics in Medicine and Biology·Ane EtxebesteGabriela Llosá
Jun 29, 2016·Physics in Medicine and Biology·Paola SoleviGabriela Llosá
Jul 19, 2017·Physics in Medicine and Biology·Enrique MuñozGabriela Llosá

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Citations

Nov 19, 2019·Physics in Medicine and Biology·Enrique MuñozJosep F Oliver
Jul 20, 2019·Physics in Medicine and Biology·Takashi NakanoTadayuki Takahashi
Oct 30, 2020·Physics in Medicine and Biology·A Ros GarcíaG Llosá
Mar 27, 2021·Physics in Medicine and Biology·David SarrutEmilie Roncali

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