FRCR FRCR Neuroradiology 3

Question 1

Which MRI spectroscopy metabolite peak is characteristically elevated in high-grade gliomas, reflecting increased cell membrane turnover?

Accepted Answer

Choline

Answer

NAA (N-acetylaspartate)

Answer

Creatine

Answer

Myoinositol

Question 2

What is the classic MRI finding in Wernicke encephalopathy?

Accepted Answer

Symmetric T2/FLAIR hyperintensity in the mammillary bodies and periaqueductal gray matter

Answer

Frontal lobe cortical atrophy with T2 hyperintensity

Answer

Asymmetric temporal lobe signal change with enhancement

Answer

Cerebellar hemisphere T2 hyperintensity with DWI restriction

Question 3

What is the most common cause of multiple ring-enhancing brain lesions in an HIV-positive patient with a CD4 count below 200 cells/µL?

Accepted Answer

Toxoplasma gondii encephalitis

Answer

Glioblastoma multiforme

Answer

Cerebral abscess (bacterial)

Answer

Primary CNS lymphoma

Question 4

An epidural hematoma following head trauma typically results from rupture of which vessel, and at which skull location?

Accepted Answer

Middle meningeal artery at the pterion

Answer

Superior sagittal sinus at the vertex

Answer

Posterior meningeal artery at the occipital bone

Answer

Bridging cortical veins at the parietal convexity

Question 5

What Hounsfield unit (HU) range is expected for acute blood on non-contrast CT?

Accepted Answer

35–90 HU (hyperdense)

Answer

0–20 HU (hypodense)

Answer

–100 to –50 HU (fat density)

Answer

100–150 HU (calcification range)

Question 6

Which MRI finding is associated with idiopathic intracranial hypertension (IIH) on brain imaging?

Accepted Answer

Empty sella, flattening of posterior globes, and distension of optic nerve sheaths

Answer

Enlarged lateral ventricles with periventricular edema

Answer

Bilateral thalamic T2 hyperintensity

Answer

Multiple white matter T2 lesions in the periventricular region

Question 7

On susceptibility-weighted imaging (SWI), which condition produces multiple small 'blooming' foci predominantly in the corticomedullary junction and cortex in an elderly patient?

Accepted Answer

Cerebral amyloid angiopathy (CAA)

Answer

Hypertensive microangiopathy

Answer

Multiple cavernous malformations

Answer

Diffuse axonal injury (DAI)