1. An apparatus, comprising: circuitry configured to acquire a first set of data by under-sampling a first portion of a k-space at a first rate, and acquire a second set of data by under-sampling a second portion of the k-space at a second rate, generate a first intermediate image and a second intermediate image based on the acquired first set of data and the acquired second set of data, respectively, construct a difference image based on the generated first intermediate image and the generated second intermediate image, the difference image including a plurality of artifacts, and reconstruct a final image by selectively combining the first intermediate image with the second intermediate image, the combining being based on identifying, for each artifact of the plurality of artifacts included in the difference image, one of the first intermediate image and the second intermediate image as being a source of the artifact.