Morahan, A;
Erlandsson, K;
Cerrato, A;
D'Adda, I;
Carminati, M;
Ljungberg, M;
Fiorini, C;
(2021)
Impact of DOI in a clinical SPECT/MRI system:asimulation study.
In:
Proceedings of the 2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
IEEE: Boston, MA, USA.
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Abstract
A novel SPECT/MRI scanner has been modelled and tested here using Monte Carlo simulation software, SIMIND. The INSERT SPECT/MRI system faces challenges with event reconstruction due to photon depth of interaction. The novel SPECT system is subject to parallax errors due to its crystal size and slit aperture collimator. We present a simple measure of the DOI errors through SIMIND experiments; by modelling the DOI layers we are able to improve the reconstruction of projection data in the INSERT scanner. A set of capillary phantoms are simulated to explore the impact of DOI on the resolution of the scanner and establish corrections in the system's reconstruction.
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