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- W2048119076 abstract "Respiratory motion as a source of artefacts and quantification inaccuracies in PET is receiving increasing attention as the spatial resolution of modern PET scanners continuously improves. The influence of respiratory motion on the spatial resolution of the ECAT EXACT3D scanner (system spatial resolution: 4.8±0.2 mm FWHM) was measured on point source data. Parameters reported from thoracic MRI imaging [1,2] were used to simulate average motion during respiration. A degradation of the point spread function in the axial direction by a factor of 1.5 (Hann) to 2 (ramp filter) in the FWHM was observed in experimental measurements simulating respiratory motion at the level of the heart. As a means of accounting for motion, respiratory gating of data in list mode was implemented [3]. The technique was applied on patient studies with 18F-FDG and C15O. A similar effect of degrading spatial resolution was observed in the ungated patient data compared to the repiratory gated images on the basis of the reconstructed images. The results suggest that respiratory gating should be employed when high resolution and accurate quantification are required." @default.
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- W2048119076 date "2004-04-01" @default.
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- W2048119076 title "Influence of respiratory motion in PET imaging" @default.
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- W2048119076 doi "https://doi.org/10.1097/00006231-200404000-00037" @default.
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