| 摘要 |
PROBLEM TO BE SOLVED: To provide images in which signals from tissues for which both T1 and T2 are long such as CSF (cold start fix), or the like are suppressed in the case of obtaining proton density emphatic images and T2 emphatic images at a high speed by using an FSE (fast spin echo) method and a GRASE (gradient and spin echo) method. SOLUTION: By applying a 180°pulse 53 of a forced excitation pulse string B simultaneously with a gradient magnetic field Gs pulse 64 for slice selection at the point of time that an ESP (echo space) elapses from the last 180°pulse 52 of a pulse sequence A for signals generation, applying a 90°pulse 54 together with a Gs pulse 66 at the point of time that transverse magnetization is converged after ESP/2 after that and attaining longitudinal magnetization in a direction opposite to the direction of a static magnetic field, the mitigation of the proton of the long T1 is delayed and the signals are suppressed. COPYRIGHT: (C)2004,JPO
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