Rigid motion correction of PET and CT for PET/CT brain imaging

A rigid motion correction technique is applied to both PET and CT data from the Siemens mCT PET/CT scanner. Motion was applied to a Hoffman brain phantom during both the CT and PET scans, as well as between them. The motion data, which was tracked by an external motion tracker, was used to correct the motion corrupted tomographic data during reconstruction. The motion corrected CT reconstruction was used for attenuation correction in the PET reconstruction. The subsequent reconstructions are compared to scans taken without motion to show the effectiveness of the motion correction.