Neuroradiology 1

Question 1

How does contrast show up on CT scans

Answer 1

The density in electrons shows up white

Question 2

How does contrast show up tumours/inflammation on CT

Answer 2

Iodinated contrast does not pass into brain because of blood brain barrier, however this can be disrupted by tumours or inflammtion

Question 3

What are the contraindications of MRI

Answer 3

Any implanted magnetic devices

Electronic devices that may be disrupted by RF pulses

Question 4

When is angiography indicated?

Answer 4

Investigation of Sub arachnoid haemorrhage

Suspected aneurysm

Carotid stenosis

Question 5

3 main causes of subarachnoid haemorrhage

Answer 5

Ruptured aneurysm- 85%

Bleed from AVM- 10%