CT Head

Question 1

Subdural haematoma

Answer 1

Crescenteric
High density (blood)
Cerebral veins
+/- mass effect > sulci effacement on ipsilateral side

Question 2

Axial

Answer 2

Aka transverse

Splits body into head and toe ends

Question 3

Sagittal

Answer 3

Plan parallel to sagittal sulcus. It divides body into right and left

Question 4

Coronal

Answer 4

Divides body into front and back

Question 5

Contrast medium

Answer 5

Enhances mass or cystic lesions - appear high density on contrast CT (white)

Question 6

Blood

Answer 6

High density

WHITE

Question 7

Mass

Answer 7

Low density

BLACK

Question 8

CT head systematic approach

Answer 8

1. Compare right and left
2. Midline shift
3. Ventricles - hydrocephalus
4. Basilar cisterns - SAH
5. Brain parenchyma - inc/dec density lesions
6. Paranasal sinuses - fluid

Question 9

Extradural

Answer 9

Lentiform
Can’t cross suture lunes
High density (blood)
Middle meningeal artery