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Abstract #1420

Rapid Non-Contrast-Enhanced Renal Angiography Using Multiple Inversion Recovery

Hattie Zhi Chen Dong1, Pauline W. Worters2, Holden H. Wu1,3, Tolga ukur1, Brian Andrew Hargreaves2, Dwight G. Nishimura1, Shreyas S. Vasanawala2

1Electrical Engineering, Stanford University, Stanford, CA, United States; 2Radiology, Stanford University, Stanford, CA, United States; 3Cardiovascular Medicine, Stanford University, Stanford, CA, United States

We investigate the use of multiple inversion recovery (MIR) preparation for rapid non-contrast-enhanced renal angiography without image subtraction or breath-holding. MIR preparation consists of selective spatial saturation followed by several nonselective inversions to suppress a range of background T1 species, while maintaining signal from arterial inflow. Two readout approaches were chosen: alternating TR balanced SSFP (ATR-bSSFP) to provide good blood SNR with added fat suppression, and half-Fourier single-shot FSE (SSFSE) to fully capture the MIR contrast preparation. Using the two sequences, projective renal angiograms were produced in 3 and 1 heartbeat(s) respectively.