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…
Figure 9.1 Axial MRI brain with evidence of multiple left hemispheric infarcts (arrows) on diffusion-weighted imaging (DWI). Discussion This case highlights the critical importance of a detailed history and physical…
Figure 3.1 Unenhanced CT show signs of acute stroke of the left MCA territory. (a) Hyperdense left MCA sign, in which high attenuation thrombus is seen extending from the left…
Figure 12.1 Schematic diagram of the investigation of thunderclap headache. CT, computed tomography; MRI, magnetic resonance imaging; MRA, magnetic resonance angiography; MRV, magnetic resonance venography; TCD, transcranial Doppler; DSA, digital…
Figure 2.1 Flow voids in the basal ganglia are demonstrated bilaterally on axial T1 MRI (see arrows). This is representative of hypertrophy of the basal ganglia perforator arteries. Figure 2.2…
Figure 5.1 Axial diffusion-weighted (right) and apparent diffusion coefficient (left) images show evidence of restricted diffusion in the right MCA distribution consistent with an acute cerebral infarction. Discussion Prosthetic heart…
Figure 7.1 (a) Bilateral pontine and left temporo-occipital infarcts on diffusion-weighted imaging consistent with acute infarct in basilar artery and posterior cerebral artery territories. (b) Dense basilar artery on initial…
