Neuroradiology

Question 1

MRI Isointense T1, Bright T2

Answer 1

Hyperacute stroke (<24h)

Question 2

MRI Isointense T1, Dark T2

Answer 2

Acute (1-3 days)

Question 3

MRI bright T1, Dark T2

Answer 3

Early subacute (3-7 days)

Question 4

MRI bright T1, Bright T2

Answer 4

Late subactute (7-14 days)

Question 5

MRI dark T1, dark T2

Answer 5

Chronic (> 14 days)

Question 6

Most common artery affected in stroke

Answer 6

Middle cerebral artery (MCA)

Question 7

Artery affected in contralateral hemiparesis + ipsilat hemianopsia + preferential gaze toward side of the lesion

Answer 7

Middle cerebral artery (MCA)

Question 8

Artery affected in contralat homonymous hemianopsia + cortical blindness + visual agnosia + impaired memory

Answer 8

Posterior cerebral artery (PCA)

Question 9

Artery affected in brainstem deficits, crossed findings (ipsilat CN deficits & contralat motor deficits)

Answer 9

Vertebrobasilar system

Question 10

Artery affected in primitive reflexes, contralat weakness (greater in legs than arms)

Answer 10

Anterior cerebral artery (ACA)

Question 11

Empty sella
Flattening of posterior aspect of the globe
Distention of perioopotic subarachnoid space
Transverse venous sinus stenosis

Answer 11

Pseudotumor cerebri w/o papilledema