PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus capable of suppressing deterioration in image quality even when Larmor frequency varies due to an eddy current magnetic field.SOLUTION: The magnetic resonance imaging apparatus includes: a gradient magnetic field generation circuit configured to apply a gradient magnetic field pulse according to a pulse sequence in which transmission of an RF pulse and application of the gradient magnetic field pulse are included； and an RF transmission circuit which modulates a controlled output waveform of the RF pulse in such a manner that the controlled output waveform of the RF pulse follows time variation of a magnetic resonance frequency caused by time variation of an eddy-current magnetic field estimated from a waveform of the gradient magnetic field pulse, and transmits the RF pulse subjected to the modulation.SELECTED DRAWING: Figure 5【課題】渦電流磁場に起因してラーモア周波数が変化した場合でも、画質の劣化を抑制することができる磁気共鳴イメージング装置を提供する。【解決手段】磁気共鳴イメージング装置は、ＲＦパルスの送信及び傾斜磁場パルスの印加が含まれるパルスシーケンスに従って、傾斜磁場パルスを印加する傾斜磁場発生回路と、傾斜磁場パルスの波形から推測される渦電流磁場の時間的な変化、に起因する磁気共鳴周波の時間的な変化に追従させて、ＲＦパルスの出力制御波形に対して変調を施し、変調後のＲＦパルスを送信するＲＦ送信回路とを備える。【選択図】図５
