1. A magnetic resonance imaging (MRI) apparatus comprising: a scanner configured to: acquire, at a first time point, a first image that is a T1-weighted image and a second image that is a fluid attenuated inversion recovery (FLAIR) image by performing a first MRI scan on a brain; and acquire, at a second time point, the first image and the second image by performing a second MRI scan on the brain; an image processor configured to: determine a white matter region in the second image, based on the first image and the second image; and detect a white matter hyperintensity (WMH) region in the determined white matter region; and an output interface configured to display the detected WMH region and a generation and a loss of the detected WMH region over time between the first time point and the second time point.