Neuro Radiology Glossary

Bleeding into the subarachnoid space caused by rupture of an intracranial aneurysm, requiring emergency imaging and inte...

Quantitative measure of water molecule diffusion calculated from diffusion-weighted imaging, helpful in characterizing t...

Non-contrast MRI perfusion technique using magnetically labeled blood as an endogenous tracer to measure cerebral blood...

Abnormal tangle of blood vessels with direct arterial-to-venous connections, bypassing normal capillary beds and carryin...

Alberta Stroke Program Early CT Score, a systematic method for quantifying early ischemic changes on non-contrast CT in...

Selective physiological barrier that restricts passage of substances from blood to brain tissue, visible on imaging when...

MRI technique measuring brain activity through blood oxygen level-dependent signal changes.

Blood oxygen level-dependent signal used in functional MRI to detect brain activity based on hemodynamic changes.

Vascular anomaly consisting of enlarged capillary spaces without normal brain tissue, showing characteristic popcorn app...

Abnormal inferior displacement of the cerebellar tonsils below the foramen magnum, measured on sagittal MRI.

Displacement of cerebellar tonsils through the foramen magnum, indicating increased intracranial pressure.

Vascular disorder caused by amyloid protein deposition in brain blood vessels, associated with lobar hemorrhages.

The brain's ability to maintain constant blood flow despite changes in perfusion pressure, assessable with perfusion ima...

Small hemorrhagic lesions visible on susceptibility-sensitive MRI sequences, indicating underlying vasculopathy.

MRI artifact causing spatial misregistration between fat and water signals, particularly visible at tissue interfaces.

Structural defect characterized by extension of cerebellar tonsils below the foramen magnum, potentially causing CSF flo...

Vascular structure within brain ventricles that produces cerebrospinal fluid, commonly showing enhancement on MRI.

Small, old stroke in deep brain structures appearing as fluid-filled cavity with surrounding gliosis.

The ring-like arterial structure at the base of the brain that provides collateral circulation between the anterior and...

A heavily T2-weighted MRI sequence providing high-resolution imaging of CSF spaces and cranial nerves.

Alternative blood flow pathways that develop or become prominent when primary vessels are occluded or severely stenotic.

Benign cystic lesion typically located in the third ventricle that can cause intermittent hydrocephalus.

Posterior portion of the corpus callosum connecting the occipital and posterior temporal lobes bilaterally.

Developmental malformation of cerebral cortex with abnormal neuronal organization, often causing epilepsy.