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.