The super selective arterial spin labeling (ssASL) was used in the early postoperative period to evaluate the revascularization area (RA) obtained by a bypass from the superficial temporal artery to the middle cerebral artery in Moyamoya disease, and the perfusion territory changes of the major cerebral arteries were evaluated. The results indicated the postoperative perfusion territory changes of the major cerebral arteries differed between the RA-positive group and the RA-negative group. The incidence of preoperative external carotid artery compensation was significantly higher in the RA-negative group than the RA-positive group. There was good intermodality agreement between ssASL and CT angiography.
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