Figure 3

DWI, FLAIR, and Mismatch volumes and NIHSS Scores of individual patients. A. Abnormal DWI lesion volumes at baseline, 4 hours, and 24 hours are depicted in light blue;the 1-week FLAIR lesion volume is depicted in dark blue; and the red bars represent the 'Mismatch' lesion volumes (abnormal MTT lesion volume minus the abnormal DWI lesion volume). Five patients showed evidence for arterial recanalization (arrows, R) on serial MR angiography. One patient had partial recanalization at 4 hours, and four patients recanalized by 24 hours. The time of presentation in hours after stroke onset is shown in parenthesis below each patient number. Patients treated with NBO are marked with asterisks. Notably, a substantial volume of 'Mismatch' was maintained over the 24-hour period of imaging in most patients. B. The NIH stroke scale score for each patient at each imaging time point is displayed.