Neuroradiology — Flashcards

Flashcard 71: What is the cause of the 'puff of smoke' lesion seen in Moyamoya disease?_____

Answer: As it is a chronic condition, the lenticulostriate arteries develop a rich collateral circulation around the occlusive lesion

Flashcard 72: _____ myelography can help in the evaluation of active CSF leaks.

Answer: MR

Extra: MR myelography is highly sensitive for detecting the presence of extrathecal CSF (the "presence" of a leak) and is non-invasive. CT myelography is traditionally the gold standard for localizing the exact site of the leak before surgical repair.

Flashcard 73: _____ myelography can be performed without intrathecal contrast

Answer: MR (X-Ray/MR)

Flashcard 74: Most sensitive investigation for Cortical vein thrombosis is _____

Answer: MR Venography

Flashcard 75: The most useful projection for detecting an orbital floor fracture is _____ view.

Answer: Waters

Flashcard 76: The 'hole-within-a-hole' (beveled edge) appearance of the skull is characteristic of which condition?

Answer: Langerhans cell histiocytosis (most commonly Eosinophilic granuloma)

Flashcard 77: The preferred imaging modality in term neonates with hypoxic ischemic encephalopathy (HIE) is _____

Answer: diffusion-weighted magnetic resonance imaging (MRI)

Flashcard 78: T2-weighted MRI brain scans in Hallervorden-Spatz Disease (HSD) shows the _____ sign.

Answer: eye of the tiger

Flashcard 79: _____ provides a superior definition of the relationship of the glomus tumor to adjacent vascular and skull base structures.

Answer: Gadolinium-enhanced MRI

Flashcard 80: Smaller lesions may be missed on _____ myelography due to its lower signal-to-noise ratio

Answer: MR (X-Ray/MR)