1. A method for reconstructing a magnetic resonance (MR) image, the method comprising: obtaining an MR data set by sampling first and second sampling regions, wherein a first region is sampled with a first sampling density that is higher than a second sampling density of a second region; generating MR images corrupted by aliasing artifacts by reconstructing the obtained MR data set; and combining the generated MR images with parallel imaging, using an acceleration rate of the second region.