Monte Carlo-based scatter correction for the SMARTZOOM collimator

Autor: Martijn M. A. Dietze, Britt Kunnen, Martina Stella, Hugo W. A. M. de Jong
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: EJNMMI Physics, Vol 7, Iss 1, Pp 1-14 (2020)
Druh dokumentu: article
ISSN: 2197-7364
DOI: 10.1186/s40658-020-00318-7
Popis: Abstract Background Myocardial perfusion imaging is a commonly performed SPECT protocol and hence it would be beneficial if its scan duration could be shortened. For traditional gamma cameras, two developments have separately shown to allow for a shortened scan duration: (i) reconstructing with Monte Carlo-based scatter correction instead of dual-energy window scatter correction and (ii) acquiring projections with the SMARTZOOM collimator instead of a parallel-hole collimator. This study investigates which reduction in scan duration can be achieved when both methods are combined in a single system. Results The SMARTZOOM collimator was implemented in a Monte Carlo-based reconstruction package and the implementation was validated through image quality phantom experiments. The potential for scan duration reduction was evaluated with a phantom configuration that is realistic for myocardial perfusion imaging. The original reconstruction quality was achieved in 76 ± 8% of the original scan duration when switching from dual-energy window scatter correction to Monte Carlo-based scatter correction. The original reconstruction quality was achieved in 56 ± 13% of the original scan duration when switching from the parallel-hole to the SMARTZOOM collimator. After combining both methods in a single system, the original reconstruction quality was achieved in 34 ± 7% of the original scan duration. Conclusions Monte Carlo-based scatter correction combined with the SMARTZOOM collimator can further decrease the scan duration in myocardial perfusion imaging.
Databáze: Directory of Open Access Journals
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