Control Practical: Brain imaging

Question 1

Which of CT and MRI uses high levels of radiation?

Answer 1

CT

Question 2

Which of CT and MRI is more expensive to run?

Answer 2

MRI

Question 3

Name a relative contraindication for CT scans

Answer 3

Pregnancy

Question 4

Name an absolute and a relative contraindication for MRI scans

Answer 4

Absolute: Metal implants eg. pacemakers
Relative: Claustrophobia

Question 5

Which of MRI and CT gives the best detail on bone?

Answer 5

CT

Question 6

Which of MRI and CT gives the best detail on soft tissue?

Answer 6

MRI

Question 7

Would soft tissue be better seen on a low or a high window CT scan?

Answer 7

Low

Question 8

Would a T1 or T2 sequence be used to see contrast in the bloodstream on an MRI scan?

Answer 8

T1

Question 9

Is bone dark or light on MRI scans?

Answer 9

Dark

Question 10

Is air dark or light on a T1 MRI?

Answer 10

Dark

Question 11

Is air dark or light on a T2 MRI?

Answer 11

Dark

Question 12

Is fat dark or light on a T1 MRI?

Answer 12

Light

Question 13

Is fat dark or light on a T2 MRI?

Answer 13

Dark

Question 14

Is fluid dark or light on a T1 MRI?

Answer 14

Dark

Question 15

Is fluid dark or light on a T2 MRI?

Answer 15

Light

Question 16

What is the most inferoposterior lobe of the cerebrum?

Answer 16

Occipital

Question 17

What is the most superoposterior lobe of the cerebrum?

Answer 17

Parietal

Question 18

In which MRI sequence would white matter appear darker than grey matter?

Answer 18

T2

Question 19

What does TAC stand for in the Bamford/Oxford stroke classification?

Answer 19

Total anterior cirulation

Question 20

What does PAC stand for in the Bamford/Oxford stroke classification?

Answer 20

Partial anterior circulation

Question 21

What does LAC stand for in the Bamford/Oxford stroke classification and what arteries are affected in a lacunar stroke?

Answer 21

Lacunar

Penetrating arteries

Question 22

What does POC stand for in the Bamford/Oxford stroke classification?

Answer 22

Posterior circulation

Question 23

Is CT or MRI primarily used for stroke imaging?

Answer 23

CT

Question 24

In a haemorrhagic stroke, would the main bleed appear bright or dark?

Answer 24

Bright

Question 25

In an ischaemic stroke, would the main bleed appear bright or dark?

Answer 25

Dark

Question 26

In an ischaemic stroke, would the thrombus appear bright or dark?

Answer 26

Bright

Question 27

Do acute haemorrhages appear brighter or darker than chronic ones in a CT?

Answer 27

Brighter

Question 28

In what kind of haemorrhage would the blood outline the sulci and gyri of the cerebrum?

Answer 28

Subarachnoid

Question 29

Which kind of intracranial haemorrhage is almost always caused by trauma and would be characterised by unconsciousness following a lucid interval?

Answer 29

Extradural

Question 30

What does 'contrecoup' mean in terms of a coup-contrecoup injury?

Answer 30

Contralateral subdural or subarachnoid haemorrhage due to trauma