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Abstract #2654

Motion correction of PET images using Spherical Navigator echoes (SNAVs) on a hybrid PET-MR scanner

Patricia Johnson1,2, Reggie Taylor3,4, Tim Whelan1, and Maria Drangova1,2

1Robarts Research Institute, London, ON, Canada, 2Medical Biophysics, Western University, London, ON, Canada, 3Lawson Health Research Institute, London, ON, Canada, 4Siemens Canada, Oakville, ON, Canada

Head motion during brain imaging with hybrid PET-MR degrades the quality of both the PET and MR images. Simultaneous acquisition with the two modalities provides the opportunity for MR motion measurement techniques to be used for correction of PET data. In this study, spherical navigator echoes (SNAV) were used for retrospective motion correction of PET images. A phantom was repositioned several times during a list mode acquisition. The list mode data was binned into motion states based on the SNAV measured motion, and a motion-corrected PET reconstruction was performed. SNAV motion correction successfully removed blurring in the PET images.

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