A magnetic resonance imaging MRI) apparatus, including a signal transceiver a controller configured to control the signal transceiver to apply a bipolar gradient magnetic field in an aortic direction, the aortic direction being a direction in which an aorta is disposed within an object and an image processor configured to receive, from the signal transceiver, phase signal data obtained by applying the bipolar gradient magnetic field to the object, acquire motion data representing a first motion corresponding to a heartbeat of the object and a second motion corresponding to a respiration of the object based on the phase signal data, and acquire MRI data based on the motion data.
