Flip Angle ModulatioN Scheme (FANS) to Achieve an Arbitrary Signal Modulation in SPGR

Yongchuan Lai¹

Spoiled gradient-recalled echo (SPGR) is widely used for T1 contrast applications. A variable flip angle (FA) scheme may be used to mitigate the signal modulation caused by Mz preparation. However, the challenge remains to find an appropriate variable flip angle scheme given a desired signal modulation. Here we propose a novel algorithm, Flip Angle modulatioN Scheme (FANS), to find such an optimal FA scheme to achieve an arbitrary signal modulation. FANS is implemented with the BRAVO of GE 1.5T scanner and better CNR is achieved in both simulation and in vivo scan.