PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus with an optimized filter circuit.SOLUTION: The magnetic resonance imaging apparatus includes: a magnetostatic field generation means which generates a uniform magnetostatic field in a space housing a subject a gradient magnetic field generation means which generates a gradient magnetic field to be superimposed on the magnetostatic field a transmission means which generates a high-frequency magnetic field to irradiate the subject a detection means which detects a nuclear magnetic resonance signal generated from the subject and an imaging means which images the detected nuclear magnetic resonance signal. The detection means includes a means which has a notch filter for removing harmonic wave of Local signal of the nuclear magnetic resonance signal and/or a preliminarily generated intermediate frequency portion, mixes the nuclear magnetic resonance signal and the intermediate frequency to generate a mixed signal and outputs the mixed signal to the imaging means.COPYRIGHT: (C)2012,JPO&INPIT【課題】 フィルタ回路が最適化された磁気共鳴イメージング装置を提供する。【解決手段】 被検体を収容する空間に均一な静磁場を発生させる静磁場発生手段と、前記静磁場へ重畳して傾斜磁場を発生させる傾斜磁場発生手段と、前記被検体へ照射する高周波磁場を発生する送信手段と、前記被検体から発生する核磁気共鳴信号を検出する検出手段と、前記検出された核磁気共鳴信号を画像化する画像化手段と、を備えた磁気共鳴イメージング装置であって、前記検出手段は、前記核磁気共鳴信号及び/あるいは予め生成した中間周波数部のLocal信号の高調波を取り除くノッチフィルタを有し、前記核磁気共鳴信号と前記中間周波数とを混合し混合信号を生成し、前記画像化手段へ該混合信号を出力する手段を備える。【選択図】 図7
