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• W2010905858 abstract "Abstract Objective To characterize the performance of the Biograph mCT PET/CT TrueV scanner with time of flight (TOF) and point spread function (PSF) modeling. Material and methods The PET/CT scanner combines a 64-slice CT and a PET scanner which incorporates the reconstruction the TOF and PSF information. PET operating characteristics were evaluated according to the standard NEMA NU-2-2007, by expanding some tests. In addition, different reconstruction algorithms were included, and the intrinsic radiation and tomographic uniformity were also evaluated. Results The spatial resolution (FWHM) at 1 and 10 cm was 4,4 and 5,3 mm respectively, improving to 2,6 and 2,5 mm when PSF was introduced. Sensitivity was 10.9 and 10.2 kcps/MBq at 0 and 10 cm from the axis. Scatter fraction was less than 34% at low concentrations and the noise equivalent count rate (NECR) was maximal at 27.8 kBq/mL with 182 kcps, and the intrinsic radiation produced a rate of 4,42 true coincidences per second. Coefficient of variation of the volume and system uniformity was 4,7 and 0,8% respectively. The image quality test showed better results when PSF and TOF were included together. PSF improved the hot spheres contrast and background variability, while TOF improved the cold spheres contrast. Conclusions The Biograph mCT TrueV scanner has good performance characteristics. The image quality improves when the information from the PSF and the TOF is incorporated in the reconstruction." @default.
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• W2010905858 date "2013-01-01" @default.
• W2010905858 modified "2023-10-18" @default.
• W2010905858 title "Contribution of time of flight and point spread function modeling to the performance characteristics of the PET/CT Biograph mCT scanner" @default.
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• W2010905858 doi "https://doi.org/10.1016/j.remnie.2012.11.012" @default.
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