1. A method of obtaining a magnetic resonance imaging (MRI) image by an MRI apparatus comprising a processor, the method comprising: repeatedly performing a sequence of obtaining a navigator image that tracks breathing of a subject and obtaining MRI data of a subject region, multiple times, during a predetermined time period; extracting MRI data obtained at a point of time at which a heartbeat and the tracked breathing of the subject are paused, based on the obtained navigator images; and generating an MRI image of the subject region by transforming the extracted MRI data through fat suppression, in response to the extraction of the MRI data being completed, wherein the performing of the sequence comprises determining whether a navigator image obtained in a current sequence is an image taken at a point of time at which the breathing of the subject is paused; and determining MRI data to be obtained in a next-order sequence based on whether the navigator image obtained in the current sequence is an image corresponding to the point of time at which breathing of the subject is paused.