Neuro radiology

Question 1

On a CT scan of the brain, how can we find the midbrain?

Answer 1

Look for the mickey mouse looking structure

Question 2

what can cause reduced grey-white differentiation?

Answer 2

infarct

Question 3

What do old infarcts look like on CT brain?

Answer 3

black

Question 4

for investigation of head injuries, what is the the gold standard ix?

Answer 4

CT brain WITHOUT contrast (looking for a bleed)

Question 5

what ix would you use if you want to ix a skull fracture?

Answer 5

CT. Then change to bone window

Question 6

characteristic of an extradural haematoma?

Answer 6

biconvex in appearance, some mass effect may be seen

Question 7

what do we think if we see varying densities in the bleed on CT brain scan?

Answer 7

acute on chronic bleeds

Question 8

what is another name for chronic subdurals?

Answer 8

subdural hygroma

Question 9

which person older/younger would be susceptible to diffuse axonal injury?

Answer 9

older due to atrophy

Question 10

What sites is the brain fixed?

Answer 10

brainstem

corpus callosum x 2

Question 11

what is diffuse axonal injury?

Answer 11

shearing forces from high speed trauma

Question 12

what must be consider with a diffuse axonal injury?

Answer 12

late presentation. Initial CT may appear normal. So get a MRI