| 摘要 |
PROBLEM TO BE SOLVED: To create a static magnetic field unevenness map wherein the principal value rotation of a phase is reduced when obtaining, by phase unwrapping processing, a phase rotation amount caused by static magnetic field unevenness by obtaining and correcting the inclination of the phase generated between different TEs with high accuracy so as to obtain an image wherein the counterchanging between water and fat is reduced.SOLUTION: A magnetic resonance imaging apparatus calculates the inclination of a phase generated in images between different echoes by obtaining an average or a weighting average value of differential values of the phase (a phase difference between adjacent pixels). By correcting the inclination of the phase generated in the images between the echoes by the inclination of the phase, the magnetic resonance imaging apparatus reduces the principal value rotation of the phase when obtaining a phase rotation amount by static magnetic field unevenness (a static magnetic field unevenness map) by phase unwrapping processing. Thereby, an image wherein the counterchanging between a water and fat image is reduced can be obtained. |
