| 摘要 |
PROBLEM TO BE SOLVED: To provide a water/fat separation technique in which is calculated with a higher degree of accuracy a phase image reflected with nonuniformity in static magnetic field in a 2-Point Dixon method, and which therefore prevents a water image from being exchanged with a fat image, thereby separating water and fat without placing a burden of determination on an operator.SOLUTION: The possibility is increased that a phase distribution showing phase changes due to nonuniformity in static magnetic field is calculated accurately. Further, water and fat are separated using signal values from which the effect of the nonuniformity in static magnetic field is eliminated. For implementation of this, start point candidates are determined so that in a calculation of the phase distribution, a pixel constituted mainly of a water signal is selected with a higher probability as the start point of phase unwrapping processing which uses a region expanding method. In addition, the correctness of the calculated phase distribution is determined with a high degree of accuracy, using the characteristics of the start point candidates. |
