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Abstract #0610

Rapid high resolution simultaneous mapping of composite T1, water-only T1 and PDFF in the abdomen with dual-echo IR-radSPGR pulse sequence

Zhitao Li1,2, John M Pauly2, and Shreyas Vasanawala1
1Department of Radiology, Stanford University, Palo Alto, CA, United States, 2Electrical Engineering, Stanford University, Palo Alto, CA, United States

A radial IR-SPGR pulse sequence with bipolar readouts is demonstrated along with a model-based iterative reconstruction to simultaneously map high resolution composite and water-only T1 and proton density fat fraction (PDFF) in the abdomen. The proposed pulse sequence and reconstruction algorithm can yield high-quality T1 and PDFF maps in 2.5 seconds/slice. The resulting maps have an in-plane resolution of 1.25mm and through-plane resolution of 5.00mm. When combined with selective inversion pulse, the technique achieves multi-slice imaging for breath-hold studies.

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