Fast Dixon Fat/Water Separation with Cartesian Total Sampling Time Sequence
Bookwalter C, Sunshine J, Duerk J
Case Western Reserve University
Continuously sampled sequences (a.k.a., total sampling time (TST) acquisitions) sample data during the entire read gradient application including the traditional flat top, ramps, dephase and rephase lobes in order to capture one full and two partial echoes. The three echoes acquired by a Cartesian TST sequence may be used for fat/water separation. In this study, a simple time spacing of 2.2 ms between the start of the dephase lobe and the true echo allowed Dixon fat/water separation. Phantom and in vivo images showed the same contrast between fat and water in the TST data compared to traditional two-acquisition Dixon method.