Investigation of image quality and NEC in a TOF-capable PET scanner
作者： S. Surti , J.S. Karp , L.M. Popescu , M.E. Daube-Witherspoon , M. Werner
DOI: 10.1109/NSSMIC.2004.1466780
关键词:
摘要: The purpose of this work is to determine the benefit which can be achieved in image quality for a time-of-flight (TOF) capable 3D whole-body PET scanner. We simulate scanner with complete modeling spatial and energy resolutions. simulated has diameter 84-cm, an axial FOV 25-cm, uses 4times4times30-mm3 pixelated LaBr3 Anger-logic detector. Multiple simulations were performed 27-cm 70-cm long uniform cylinder hot spheres (22,17,13, 10-m diameter) central slice, 10-mm slice at 1/4 (8:1 activity uptake ratio respect background). Image reconstruction was list-mode iterative TOF algorithm data currently analyzed true coincidences after attenuation correction timing resolutions 300,600,1000-ps non-TOF. Our results show that contrast recovery improves (NEMA NU2-2001 analysis). Detectability estimated using non-prewhitening matched filter (NPW SNR) also best are obtained resolution les300 ps
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