| 摘要 |
PURPOSE:To obtain an image reduced in an artifact by making it possible to cancel the component of an external radiowave and removing the effect thereof, by synthesizing the receiving signals of both of an NMR signal detection coil and an external radiowave detection coil by a signal synthesizer circuit. CONSTITUTION:A signal detection coil 6 for detecting the NMR signal from the examinee 1 is constituted of a saddle shaped coil and arranged in relatively close vicinity to the body surface of the examinee 1. Further, two sets of external radiowave detection coils 7, 7 each formed of the same saddle-shaped coil as the signal detection coil 6 are respectively arranged on the head top part side and leg part side of the examinee 1. These coils 7, 7 are arranged in the vicinity of the signal detection coil 6 but do not almost perform the reception of the NMR signal from the examinee 1 and are arranged in separation from each other to a certain extent so as to only perform the reception of a external radiowave. By subtracting the receiving signal of the external radiowave detection coil 7 from that of the signal detection coil 6, the effect of the external radiowave can be almost removed.
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