Fig. 11From: Neuroimaging of acute and chronic unilateral and bilateral thalamic lesionsHigh signal intensity of both thalami (arrows in a) associated with diffusion restriction in the same area (arrows in b and c) consistent with ischaemia due to occlusion of the artery of Percheron (anatomic variant). 3D TOF shows stenosis of the P1 segment of the left posterior cerebral artery (arrowheads in d). The Percheron artery itself is not visibleBack to article page