Abstract #1420

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

Hattie Zhi Chen Dong¹, Pauline W. Worters², Holden H. Wu^1,3, 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.