An 86-year-old man who underwent CABG. A, Baseline FLAIR performed before surgery. B, Postgadolinium FLAIR. Gadolinium was administered 23 hours after surgery, and the 1.5T MR imaging was obtained 27 hours later. Postgadolinium FLAIR shows bright enhancement in the right frontal and left parietal subarachnoid space (arrows, severe sulcal HARM). C, Postoperative DWI. The patient had 6 DWI lesions.