PROBLEM TO BE SOLVED: To provide a gradient magnetic field coil device which can reduce noise without narrowing a space into which a subject is inserted for photographing.SOLUTION: A gradient magnetic field coil device has a gradient magnetic field coil 3 which generates a gradient magnetic field 13 in which magnetic field intensity is gradient, a flange and a closed loop 4. An internal wall of the closed loop 4 pressure-contacts with the external periphery of the gradient magnetic field coil over the whole periphery substantially. The gradient magnetic field coil 3 has a substantially-cylindrical shape, and the closed loop 4 has a substantially-flat plate shape, and is fixed to the substantially-cylindrical end of the gradient magnetic field coil 3. In the gradient magnetic field coil 3, a thickness at an end is thinner than a thickness at a center, and the closed loop 4 is fixed to the end of the gradient magnetic field coil 3. The gradient magnetic field coil 3 has a main coil for generating the gradient magnetic field 13 and a leakage magnetic field, and a shield coil for suppressing the leakage magnetic field. The closed loop 4 is fit to the gradient magnetic field coil 3, and fixed thereto.COPYRIGHT: (C)2014,JPO&INPIT【課題】被検者を撮像するために挿入される空間を狭くすることなく、騒音を低減できる傾斜磁場コイル装置を提供する。【解決手段】磁場強度が傾斜した傾斜磁場13を発生させ外周が略円形である傾斜磁場コイル3と、フランジ、閉ループ4とを有し、閉ループ4の内壁が周方向の略全周にわたって傾斜磁場コイル3の外周に圧接する。傾斜磁場コイル3は略円筒形状であり、閉ループ4は略平板形状であり傾斜磁場コイル3の略円筒形状の端部に固定される。傾斜磁場コイル3において端部での厚さは中央部での厚さより薄く、閉ループ4は傾斜磁場コイル3の端部に固定される。傾斜磁場コイル3は、傾斜磁場13と漏れ磁場を発生させるメインコイルと、漏れ磁場を抑制するシールドコイルとを有している。閉ループ4は、傾斜磁場コイル3に嵌められて固定されている。【選択図】図1
