PROBLEM TO BE SOLVED: To provide a sensor device suitable for an operation in a magnetic field which is temporally changeable in a magnetic resonance imaging system.SOLUTION: In the sensor device (1) including an electric sensor circuit (4) suitable for generation of sensor signals and operating in the magnetic field which is temporally changeable in the magnetic resonance imaging system, at least one induction circuit (8) is arranged in addition to the sensor circuit (4). In the induction circuit (8), a voltage (hereinafter called a compensation signal) is induced by the magnetic field which is temporally changeable at the operation of the magnetic resonance imaging system, and a circuit device is arranged, which is suitable for forming output signals by combining the compensation signal with the sensor signal so as to compensate disturbance signals induced in the sensor circuit (4) by the magnetic field which is temporally changeable.COPYRIGHT: (C)2008,JPO&INPIT【課題】磁気共鳴断層撮影装置の時間的に変化し得る磁場内での動作に適したセンサ装置を提供する。【解決手段】センサ信号の発生に適した電気的センサ回路(4)を含み、磁気共鳴断層撮影装置の時間的に変化し得る磁場内で動作するためのセンサ装置(1)において、センサ回路(4)に加えて少なくとも1つの誘導回路(8)が設けられ、誘導回路(8)内に、磁気共鳴断層撮影装置の動作時に時間的に変化し得る磁場によって電圧(以下、補償信号と呼ぶ。)が誘起され、時間的に変化し得る磁場によってセンサ回路(4)内に誘起される外乱信号を補償するように補償信号をセンサ信号結合して出力信号を形成するのに適した回路装置が設けられている。【選択図】図1
