Meeting Banner
Abstract #0367

Water-Fat Separation with a Bipolar Multiecho 3D Concentric Cylinders Trajectory

MAGNA25Kie Tae Kwon1, Holden H. Wu1, 2, Dwight G. Nishimura1

1Electrical Engineering, Stanford University, Stanford, CA, United States; 2Cardiovascular Medicine, Stanford University, Stanford, CA, United States

For water-fat separation using Dixon techniques, a bipolar multi-echo sequence acquires data more efficiently than a comparable unipolar multi-echo sequence, and also enables more robust field map estimation by shortening echo-spacings, which is crucial for reliable water-fat separation. In this work, a variation of the bipolar multiecho sequence was implemented with a 3D concentric cylinders trajectory. The concentric cylinders sequence requires fewer excitations than a comparable 3DFT sequence, thereby enabling a further scan time reduction while maintaining robustness to off-resonance effects.

Abstract PDF Presentation Video

Keywords

acquiring address applied around axial bipolar black bust caused coil comparable concentric considering corrected correcting correction crucial cylinder cylinders delays depicted designed diagram domain echoes effectively efficiently electrical enables enabling especially estimation even excite extremity facto feasibility fewer field five generalized gradients helical holden implemented improved improvement in vivo indicate inhomogeneity innermost isotropic knee linear maintaining measured medicine mount needs occurs oscillating phantom post prepared processing pulse radius read readout reduced reduction requires resolution respectively robustness rotation scanner scheme separation severe shortening sinusoidal slice slices smoothly space spacings start steep steps thereby timing trajectory turn unipolar verify version water waveforms white wight