A critical phantom study of the energy window used for ^99mTc quantitative explorations with a ring CZT SPECT system.

ABSTRACT: This study investigated, mainly for quantitative 99mTc explorations with a ring CZT SPECT system (GE HealthCare Starguide), the use of a narrow symmetric or a fully asymmetric energy window to reject scattered photons. The results were compared with the manufacturer's post-acquisition dual energy window approach. Two uniform and two cold and hot rod contrast cylindrical phantoms of various sizes were scanned with the Starguide system to acquire a very high number of counts. After rebinning the list-mode files for different energy windows, data were reconstructed with manufacturer's iterative algorithm including attenuation correction, resolution recovery and eventually scatter correction, but without any regularization technique. Cold rod residual scatter fraction, hot and cold rod contras

SUBMITTER: Seret A 

PROVIDER: S-EPMC12368274 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature