You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Intracranial atherosclerotic vascular disease (ASVD) Intracranial atherosclerotic stenosis (ICAS) Imaging Gold standard is now high-resolution MR (HRMR) with direct vessel wall imaging HRMR vessel wall imaging > > depicting lumen (DSA, CTA, MRA) Imaging findings (HRMR) Crescent-shaped…
KEY FACTS Terminology Sclerosis of small-sized arteries (arterioles) Common with chronic hypertension (HTN) &/or diabetes May lead to vascular dementia (VaD) Imaging Multifocal white matter (WM) hypodensity on CT Patchy/confluent ↑ T2/FLAIR hyperintensities Broad or confluent base with ventricles Periventricular…
KEY FACTS Terminology Hypertensive intracranial hemorrhage (hICH) Acute nontraumatic intracerebral hemorrhage (ICH) secondary to systemic hypertension 2nd most common cause of stroke Imaging Initial screen = NECT in patients with HTN CT: Acute round or oval hyperdense mass Striatocapsular: Putamen/external…
KEY FACTS Terminology Primary intraparenchymal hemorrhage (pICH) Acute nontraumatic intracranial hemorrhage (ICH) Imaging Acute round or oval intracerebral hematoma Subcentimeter “microbleeds” to massive ICH Hematoma location for common causes of pICH HTN: Basal ganglia > thalamus > pons > cerebellum…
KEY FACTS Imaging CT: Hemorrhage appearance based on density Hyperdense mass (50-70 Hounsfield units) on NECT Peripheral edema develops over 1st few days MR: Intracranial hemorrhage staging based on T1 and T2 signal characteristics MR as sensitive as CT in…
Introduction Stroke is a generic term that describes the clinical event of a sudden onset of neurologic deficit secondary to cerebrovascular disease. Stroke has 4 main etiologies, including cerebral infarction (80%), intraparenchymal hemorrhage (15%), nontraumatic subarachnoid hemorrhage (5%), and venous…
TERMINOLOGY Abbreviations Superior sagittal sinus (SSS) Inferior sagittal sinus (ISS) Internal cerebral vein (ICV) Straight sinus (SS) Great cerebral vein (vein of Galen, VofG) Transverse sinus (TS) Superior/inferior petrosal sinuses (SPS/IPS) Cavernous sinus (CS) Internal jugular vein (IJV) Basal vein…
TERMINOLOGY Abbreviations Anterior, middle, posterior cerebral arteries (ACA, MCA, PCA) Anterior, posterior communicating arteries (ACoA, PCoA) Basilar artery (BA) Vertebral artery (VA) Anterior, posterior inferior cerebellar arteries (AICA, PICA) Anterior choroidal artery (AChoA) Recurrent artery of Heubner (RAH) GROSS ANATOMY…
KEY FACTS Terminology Definition Neurodegenerative disease secondary to repetitive concussive/subconcussive head injuries Synonyms Dementia pugilistica (“punch-drunk”) Postconcussion syndrome Imaging MR Age-inappropriate volume loss – Voxel-based morphometry shows disproportionate involvement of medial temporal lobes Nonspecific T2/FLAIR punctate, confluent hyperintensities in deep,…