FIG 1. 75-year-old woman with dysphasia and weakness in the right arm. The first MR examination (left column) was performed 8 hours after the onset of symptoms, the second MR examination (middle column) was performed on the second day, and the third MR examination (right column) 1 week after stroke. The slice positions are not exactly the same but this does not change the interpretation.

Top row, Unenhanced T1-weighted images (600/14/1) show progressing low signal mass effect of the infarcted tissue.

Middle row, Contrast-enhanced T1-weighted images (600/14/1) show intravascular enhancement over the infarct on the first and second days and moderate cortical and subcortical enhancement 1 week after stroke.

Bottom row, Diffusion-weighted trace images (4000/103/1, in raw image acquisition) show the extent of infarcted tissue as areas of increased signal intensity (bright) in the territory of the left middle cerebral artery.