First and second magnetization vectors are detected for each pixel position in an imaging region including at least part of a subject, the magnetization vector being excited to have a phase difference between a flow portion and a static portion or between a normal portion and an abnormal portion. First and second pixel values at each pixel position are determined as a value proportional to an absolute value of the respectively corresponding amplitudes of the first and second magnetization vectors detected for each of the pixel positions. On the basis of a real part or phase of the magnetization vectors detected for each of the pixel positions, the determined pixel values are corrected so that the difference of pixel values corresponding to third pixel values increases between (a) the flow portion or the abnormal portion and (b) the static portion or the normal portion.
