As for the nuclear magnetic resonance device of this invention, the active internal space of the tunnel condition which possesses the Z axis (109) the high frequency excited device which also processing of the high frequency signal which was given out strongly the expedient which generates the magnetic field B0 where it becomes main in inside (101) with, the active internal space (109) the human body which is arranged (150) according to does and, strongly set of the solenoid type slope coil which superposes the addition magnetic field component to the magnetic field B0 (110) with it includes, the particular slope coil (112 - 122), the cylindrical annular space (130) it is installed in the inside of pipe which is arranged inside. The external low temperature frame (102) with the cylindrical annular space (130) with, low electrical resistivity and the conductive material of reluctance is included low between, paralleling to axis Z, the cylindrical screen (104) being arranged, it is something which can ignore the faradism which occurs the external low temperature frame (102) in although the slope which occurs the eddy current which it occurs and also, the cylindrical screen (104) in, the solenoid type slope coil (111 - 122) due to is reinforced it contributes.< Selective figure >Figure 3本発明の核磁気共鳴装置は、Z軸を有するトンネル状の使用可能な内部空間(109)内で主となる強磁場B0を発生させる手段(101)と、使用可能な内部空間(109)に配置された人体(150)に応じて発せられた高周波信号の処理も行う高周波励起装置と、強磁場B0に付加磁場成分を重ね合わせるソレノイド型勾配コイルのセット(110)とを含み、当該勾配コイル(112~122)は、円筒型環状空間(130)内に配置された管内に組み込まれている。外部低温筐体(102)と円筒型環状空間(130)との間には、低抵抗率かつ低磁気抵抗の導電性材料を含む、軸Zに沿って円筒型のスクリーン(104)が配置されて、外部低温筐体(102)において発生する誘導電流が無視できるものであるとともに、円筒型スクリーン(104)において生じた渦電流が、ソレノイド型勾配コイル(111~122)によって発生した勾配を補強するのに寄与する。【選択図】図3
