Neuroimaging

Question 1

Which of the following is NOT an early sign of brain ischemia on computed tomography (CT)?

A. Hyperdense artery sign

B. Dural tail sign

C. Insular ribbon sign

D. Effacement of the sulci

E. Loss of the lentiform nucleus

Answer 1

B. Dural tail sign

Question 2

Q
Which of the following statements is TRUE?

A. The main role of MR angiography (MRA) is for visualizing the ischemic penumbra

B. Intravenous thrombolysis is indicated up to 9 hours following stroke symptom onset in Europe

C. The abundance of collateral flow has a generally detrimental effect on stroke outcome

D. “Time shift analysis” measures perfusion by tracking a bolus of intravenously injected Gadolinium

E. Longer thrombi are associated with less successful recanalization after thrombolysis

Answer 2

e.

Question 3

Which of the following imaging patterns has been shown to reliably identify patients whose symptoms began no more than 4.5 hours prior to imaging?

A. Positive lesion on DWI and negative lesion on FLAIR

B. Positive lesion on DWI and positive lesion on perfusion imaging

C. Negative lesion on DWI and positive lesion on FLAIR

D. Negative lesion on DWI and positive lesion on perfusion imaging

E. Positive lesion on DWI and vessel occlusion on MRA

Answer 3

a

Question 4

MRI- t1- weighted images isplay..

a. grey matter as dark grey, white matter as light grey
b. grey matter as light grey, white as dark grey

Answer 4

a.

Question 5

t2- weighted images display

Answer 5

a. grey matter as dark grey, white matter as light grey
b. grey matter as light grey, white as dark grey

Question 6

FLAIR imaging displays

a. grey matter as dark, white matter as light
b. grey matter as light, white as dark

Answer 6

b.

Question 7

BBB breakdown in stroke, dementia etc. can be visualized in

a. FLAIR imaging
b. T2- weighted dynamic imaging
c- t1-weighted dynamic imaging

Answer 7

c

Question 8

Which of these modalities uses ionizing radiation? (multiple answers possible)

a. Plain Radiograph
b. ultrasound
c. digital subtraction angiography
d. MRI
e. computer tomography

Answer 8

a, b, c, e

Question 9

Which of these modalities uses ionizing radiation? (multiple answers possible)

a. Plain Radiograph
b. ultrasound
c. digital subtraction angiography
d. MRI
e. computer tomography

Answer 9

a, b, c, e