Flip Angle Strategies for Multiphase DENSE

Andreas Sigfridsson¹, Henrik Haraldsson², Tino Ebbers², Shinichi Takase¹, Hans Knutsson², Hajime Sakuma¹

In multiphase DENSE MRI, available signal decreases during the cardiac cycle due to excitation and T1-relaxation. Because of this, a widely used method is to vary the flip angle to yield constant SNR during the cardiac cycle. Unfortunately, this may lead to significant sacrifices of SNR in the early cardiac phases.