PROBLEM TO BE SOLVED: To provide MRI device comprising a means for obtaining excellent image while improving comfort in subject, in which generation of eddy current magnetic field due to leaked magnetic field and variable magnetic field due to magnetic change are suppressed and broad photographing space is provided in an iron magnetic pole upon generation of inclined magnetic field.SOLUTION: There is provided MRI device comprising a static magnetic field magnet having a magnet as magnetic pole and inclined magnetic field coil. The magnet as magnetic pole opposing to photographing space is constructed with approximately disk shaped iron magnetic pole, approximately ring shaped iron magnetic pole and magnetic pole pieces of tile shaped silicon steel plate. The magnetic pole pieces of tile shaped silicon steel plate is laminated on surface of the disk shaped iron magnetic pole. The disk shaped iron magnetic pole is divided in circumference direction and insulated each other with insulation or gap.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】傾斜磁場発生時に鉄製磁極において、漏れ磁場による渦電流磁場と磁化変化による変動磁場の発生を抑えると同時に、撮像空間を広くとることで、被検者の快適性を向上させつつ良好な画像を得る手段を備えたMRI装置を提供すること。【解決手段】磁性体磁極を有する静磁場磁石と傾斜磁場コイルを有するMRI装置において、撮像空間に対向する磁性体磁極は、略円盤状の鉄製磁極と略円環形状の鉄製磁極と略タイル形状の珪素鋼板の磁極片で構成され、前記円盤状の鉄製磁極の表面に前記タイル形状の珪素鋼板の磁極片が積層されており、前記円盤状の鉄製磁極は周回方向に分割され、絶縁物または空隙によって互いに絶縁されている。【選択図】図1
