Water-Fat Identification for Analytical Multipoint Dixons Method

Dinghui Wang¹, James G. Pipe¹

The recently proposed analytical formula obtains two sets of solutions of the field map, water and fat from images acquired at multiple points with flexible TE increments. We propose a post-processing based on regional iteration and region growing to reliably extract the correct field map from the two solutions. The field map can then be used to recalculate water and fat, and correct imaging artifacts such as blurring in spiral imaging. Results of the implementation with 3D spiral imaging suggest the feasibility of the method for a wide range of field map using short, uneven TE increments.