To control the static magnetic field generating means, and gradient magnetic field generating means, and a high-frequency magnetic field generating means, a receiving means, and signal processing means, said gradient magnetic field generating means, the high-frequency magnetic field generating means, said signal processing means and said receiving means The magnetic resonance imaging apparatus having a control means, For each direction of the gradient magnetic field, and the approximation means be approximated using a combination of parameter values of the plurality, and the gradient is approximated by the approximation means the combination of parameter values of the plurality, the output error of the gradient and evaluating means for evaluating on the basis of the quality of the magnetic resonance image is reconstructed taking into account the output error of the magnetic field, the ones within the desired combination of parameter values of the plurality based on the evaluation result by the evaluation means I comprises determining means for determining.静磁場発生手段と、傾斜磁場発生手段と、高周波磁場発生手段と、受信手段と、信号処理手段と、前記傾斜磁場発生手段、前記高周波磁場発生手段、前記受信手段及び前記信号処理手段を制御する制御手段を備えた磁気共鳴イメージング装置において、前記傾斜磁場の出力誤差を、前記傾斜磁場それぞれの方向について、複数個のパラメータ値の組み合わせを用いて近似する近似手段と、前記複数個のパラメータ値の組み合わせを前記近似手段により近似された前記傾斜磁場の出力誤差を考慮に入れて再構成された磁気共鳴画像の画質を基に評価する評価手段と、前記評価手段による評価結果に基づいて前記複数個のパラメータ値の組み合わせの内所望なものを決定する決定手段を備える。
