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• W2766771657 abstract "We propose a new method for 5D motion-compensated PET reconstruction, which is based on radial MR data and which compensates for both respiratory and cardiac patient motion. The new method is evaluated for simultaneous 18F-FDG PET/MR acquisitions of four patients with a total acquisition time of 5min per bed position. PET/MR data are sorted into 20 overlapping respiratory phases and 12 overlapping cardiac phases. Respiratory and cardiac motion vector fields are estimated sequentially from MR data employing a novel algorithm, which alternates between MR image reconstruction and motion estimation. For 5D motion-compensated PET reconstruction, the resulting motion vector fields are incorporated into the system matrix. 5D motion-compensated PET images reveal less motion blurring than 3D motion average PET and considerably lower noise levels than 5D double-gated PET reconstructions. Evaluation of the myocardium of the four patients shows a quantitative improvement in terms of SUV mean and contrast when compared to the motion average." @default.
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• W2766771657 date "2016-10-01" @default.
• W2766771657 modified "2023-09-26" @default.
• W2766771657 title "Five-dimensional respiratory and cardiac motion compensation for simultaneous PET/MR" @default.
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• W2766771657 doi "https://doi.org/10.1109/nssmic.2016.8069465" @default.
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