This composite of 2 axial MRI images reveal the appearance of an acute stroke on diffusion weighted images and the corresponding ADC (apparrent diffusion coefficient) map. The diffusion weighted image in the upper left hand side shows a focal region of increased signal (looks white) in the inferior-medial frontal lobe. The ADC map in the lower right hand side shows that there is restricted (looks dark) diffusion in this region which indicates that the abnormality most likely represents an acute (usually looks like this for 10-14 days) infarct.