1. A method of processing a magnetic resonance (MR) image of a dynamic object, the method comprising: receiving, from the dynamic object, a plurality of MR signals corresponding to a plurality of time sections and to a plurality of slices; generating a plurality of MR images, based on the plurality of MR signals; performing a segmentation of each of the plurality of MR images into a plurality of regions; determining whether a segmentation error of the segmentation occurs in each of the plurality of MR images, by calculating, for each of the plurality of MR images, a segmentation error probability, based on a difference between a size of the dynamic object in a respective one of the plurality of MR images and a size of the dynamic object in a respective previous one of the plurality of the MR images; and displaying a matrix image comprising the plurality of MR images that is arranged to respectively correspond to the plurality of time sections and the plurality of slices, a color and a transparency of each of the plurality of MR images being variably displayed to indicate a result of the determining of whether the segmentation error occurs in a respective one of the plurality of MR images.