Figure 6.1 MRI diffusion-weighted imaging shows acute ischemia in the primary motor cortex and in neighboring white matter along the MCA–anterior cerebral artery (ACA) boundary zone (arrow). Figure 6.2 CTA…
Figure 8.1 MRI scans of the head. (a) Diffusion-weighted MRI scan demonstrated minimal restricted diffusion involving the left posterior limb of the internal capsule. (b) The perfusion-weighted MRI demonstrated a…
– Eclampsia-associated vasoconstriction – Drug-induced angiitis (“angiitis” is a misnomer as there is no vessel inflammation) – Migraine “angiitis” (again, a misnomer) – Thunderclap headache with reversible vasospasm – CNS…
Figure 17.1 CT scan of the head demonstrating an acute intracranial hemorrhage in the medulla (a, axillary image), extending into the lower pons (b, sagittal image). The remainder of the…
Figure 11.1 Reversible cerebral vasoconstriction syndrome. (a) First brain MRI FLAIR axial section showing subcortical parieto-occipital hyperintensities. (b) Angio-MRI showing segmental narrowing of both middle, left anterior and posterior cerebral…
Figure 4.1 Non-contrast head CT axial image at the level of the basal cisterns demonstrates hyperdensity in the expected location of the basilar artery (arrow). The clinical history and abnormal…
Figure 16.1 Axial cranial computed tomography showing diffuse high density collection in the suprasellar cistern extending bilaterally into the Sylvian fissures consistent with subarachnoid hemorrhage. Discussion Subarachnoid hemorrhage (SAH) accounts…
Figure 10.1 Acute brain magnetic resonance imaging diffusion-weighted (a) and apparent diffusion coefficient map (b) images showing evidence of acute ischemic lesions in right frontal cortex and para-ventricular white matter…
Figure 1.1 Brain CT scan showing an old infarct in the left middle cerebral artery territory. As he was leaving the CT-scan room, he had brief involuntary movements of the…
Figure 14.1 (a) Cerebral MRI showing a recent right cortical infarct on diffusion-weighted images (upper image) and old ischemic lesions in watershed areas on FLAIR MRI (bottom image). (b) Initial…
