In order to obtain a water image in which a fat signal remains at a desired ratio with high accuracy without impairing the contrast by a simple method, in order to obtain with high precision, a plurality of echo signals obtained by reconstructing echo signals acquired with a plurality of different echo times By weighting and adding the images, a water image in which the fat signal is suppressed at a desired ratio is obtained. At this time, the plurality of different echo times are set such that the phase difference between the water signal and the fat signal included in each image differs in at least two images. The weighting coefficient used for weighted addition is determined so as to cancel the difference in signal intensity due to the difference in echo time and to suppress the fat signal at a desired ratio in the water image.簡易な手法で、コントラストを損なうことなく、所望の割合で脂肪信号の残る水画像を、高精度に得るために、複数の異なるエコー時間で取得したエコー信号をそれぞれ再構成して得た複数の画像を重み付け加算することにより、脂肪信号を所望の割合で抑制した水画像を得る。このとき、複数の異なるエコー時間は、各画像に含まれる水信号と脂肪信号との位相差が、少なくとも2つの画像において異なるよう設定される。また、重み付け加算に用いる重み係数は、エコー時間の差による信号強度の差を打ち消し、かつ、水画像において所望の割合で脂肪信号が抑制されるよう決定される。
