A magnetic resonance imaging (MRI) device according to one embodiment is provided. The MRI device includes: a display configured to display a first image of an object； a controller configured to determine a signal region of the object based on the first image of the object； and a user input device configured to receive a user input of setting a region of interest (ROI) on the first image. When the set ROI is part of the signal region of the object, the controller is further configured to control the display to display guide information for preventing aliasing artifacts from occurring in a second image to be generated based on the set ROI.
