Watershed infarctions and computed tomography. A topographical study in cases with stenosis or occlusion of the carotid artery.

Watershed processes were observed in approximately 40% of cases seen by our study group. In the axial section they mainly appear as stained or striated hypodense areas in white matter of the parietal region, with or without extension into the supply area of adjacent cerebral arteries. These findings can be very subtle and are revealed only by careful examination, especially of higher sections.