More articles from Brain
- Early Basal Ganglia Hyperperfusion on CT Perfusion in Acute Ischemic Stroke: A Marker of Irreversible Damage?
These authors found that increased cerebral blood flow and volume were seen in the basal ganglia of 4.3% of patients with ischemic strokes with CT perfusion. All patients had underlying MCA occlusions, 30% underwent hemorrhagic transformations, and the hyperperfused areas eventually became infarcted in all. Thus, acute basal ganglia hyperperfusion in patients with stroke may indicate nonviable parenchyma.
- Hyperintense Basilar Artery on FLAIR MR Imaging: Diagnostic Accuracy and Clinical Impact in Patients with Acute Brain Stem Stroke
Because FLAIR high signal intensity in occluded arteries occurs elsewhere in the brain, these authors analyzed the signal of the basilar artery in 20 instances of occlusion in a group of patients who also underwent DSA. While the FLAIR hyperintense basilar artery sign showed moderate sensitivity, its specificity and accuracy were high for the detection of occlusions. The extent of the occlusion also predicted survival.
- Calcified Cerebral Emboli, A “Do Not Miss” Imaging Diagnosis: 22 New Cases and Review of the Literature
The prevalence, imaging appearance, presumed source, treatment, and outcome of patients with calcified cerebral emboli on CT were assessed in 22 cases seen by the authors and in 48 from the literature. Most calcified emboli were found in the middle cerebral artery territory and were thought to arise from the heart, aortic arch, or carotid plaques. The overall prevalence of these emboli was 2.7% with 27% initially misdiagnosed and 9% overlooked on the first interpretation.