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Abstract #1295

Method for High Spatial Resolution of Proximal Stations in 3D Time-Resolved Fluoroscopically-Triggered Bolus Chase MRA

Thomas W. Polley1, Casey P. Johnson2, Stephen J. Riederer2

1Electrical Engineering, Brigham Young University, Provo, UT, United States; 2MR Research Laboratory, Mayo Clinic, Rochester, MN, United States

A CAPR-based fluoroscopic acquisition is described which achieves both high spatial (1.0 mm isotropic) and high temporal (2.5 sec frame time) resolution for application to 3D bolus chase MRA with real-time triggering of table motion. Compared to a prior strategy that used a high degree of view sharing, the described method significantly reduces the temporal footprint, allowing sharper imaging of proximal stations with limited acquisition time windows. The benefit of the new technique is demonstrated in CE-MRA studies of the calves.