Regional Iterative Phasor Extraction (RIPE): Effective Phase Correction for Water-Fat Imaging
University of British Columbia
Phase error is a key issue for water-fat imaging, which can be corrected with Regional Iterative Phasor Extraction (RIPE). Two error phasor candidates are calculated. An initial error phasor map is estimated either by simple averaging or other algorithms along with a confidence map. The two error phasor candidates are compared with the initial error phasor after smoothing, and the one closer is selected as a new error phasor estimate. This smooth and compare iteration is repeated till a stabilized error phasor is found, and subsequently removed from the acquired complex images leading to unambiguous water and fat solutions.