Water-Fat Separation at 3T with IDEAL and 3DPR
Yu H, Brodsky E, Reeder S, Block W
SPGR-VIPR is a 3DPR acquisition with high isotropic resolution over a large FOV. While multiple echo VIPR provides inherent partial fat suppression, this suppression and other frequency-selective methods fail in areas of high B0 inhomogeneity. We extend VIPR to acquire eight half-echos per TR, generating complex images at varying echo times. Separate fat and water images are calculated using the IDEAL algorithm which compensates for B0 inhomogeneities. Whereas scan time increases are often required to use IDEAL with Cartesian acquisitions, this technique requires no increase in scan time and will actually increase data acquisition efficiency.