method of differentiation between water and fat tissue in MRI imaging data (irm), computer readable medium, and, system that uses a modified dixon technique to differentiate between water and fat tissue in MRI imaging data (irm)

摘要

method of differentiation between water and fat tissue in MRI imaging data ('irm'),computer readable medium, and, system using a modified dixon technique to differentiate between water and fat tissue in magnetic resonance imaging data (i rm) by distinguishing between fat and water in the acquired rm data, a modified dixon technique includes first and second signs i 1 and i 2,calculate the first and second components b and signs i 1 and i 2,where one of the first and second components corresponds to fat and the other corresponds to water, derived from two differential phase error candidates from them and selecting a candidate phase error based on the presumption of softness of lack of homogeneity of disorienting field. the exact determination of the absolute values of the water and fat components is,So, done by solving the three signal equations for two variables that correspond respectively to water and fat and is performed using, for example, a minimization of minimum squares with a newton method.