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Abstract #2649

Max CAPR: High Temporal and Spatial Resolution 3D CE-MRA with Scan Times Under Five Seconds

Clifton R. Haider1, John Huston III1, Norbert G. Campeau1, James F. Glockner1, Anthony W. Stanson1, Stephen J. Riederer1

1Radiology, Mayo Clinic, Rochester, MN, USA

It is assumed in view-shared time-resolved 3D CE-MRA that spatial frequencies not updated every frame have limited variation over time. This is not the case. As the time spent in acquiring data used to reconstruct a frame increases, so does the susceptibility to time-related artifacts. Undersampling the CAPR sequence can eliminate view sharing, causing the temporal footprint to match the frame time. Due to its specific k-space sampling pattern, this can be done with CAPR without degrading the spatial resolution. 1 mm isotropic resolution results are demonstrated in MRA of the calves with image acquisition times less than 5 sec.