PROBLEM TO BE SOLVED: To provide an MRI apparatus of a novel shape of a gradient magnetic field pulse having noise suppression effects which executes pulse sequence including such gradient magnetic field pulse.SOLUTION: An MRI apparatus according to the present invention includes: a magnetic field application part which applies a high-frequency magnetic field pulse and a gradient magnetic field pulse according to a pulse sequence describing application strength and timing of the high-frequency magnetic field pulse and the gradient magnetic field pulse and a reception part which receives a nuclear magnetic-resonance signal generated by an object to be inspected by a magnetic field applied by the magnetic field application part. A shape of at least one kind of a gradient magnetic field pulse included in the pulse sequence is a shape which minimizes noise obtained under the condition that satisfies a slew rate of the gradient magnetic field in the magnetic field application part.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2017,JPO&INPIT【課題】騒音抑制効果を持つ新規な傾斜磁場パルスの形状と、そのような傾斜磁場パルスを含むパルスシーケンスを実行するMRI装置を提供する。【解決手段】本発明のMRI装置は、高周波磁場パルス及び傾斜磁場パルスの印加強度及びタイミングを記述したパルスシーケンスに従って高周波磁場パルス及び傾斜磁場パルスを印加する磁場印加部と、磁場印加部が印加した磁場により検査対象から発生する核磁気共鳴信号を受信する受信部と、を備え、パルスシーケンスに含まれる少なくとも1種の傾斜磁場パルスの形状が、磁場印加部における傾斜磁場のスルーレートを満たすという条件のもとで求められた、騒音を最小化する形状である。【選択図】図9
