Control Practical: Brain imaging Flashcards
Which of CT and MRI uses high levels of radiation?
CT
Which of CT and MRI is more expensive to run?
MRI
Name a relative contraindication for CT scans
Pregnancy
Name an absolute and a relative contraindication for MRI scans
Absolute: Metal implants eg. pacemakers
Relative: Claustrophobia
Which of MRI and CT gives the best detail on bone?
CT
Which of MRI and CT gives the best detail on soft tissue?
MRI
Would soft tissue be better seen on a low or a high window CT scan?
Low
Would a T1 or T2 sequence be used to see contrast in the bloodstream on an MRI scan?
T1
Is bone dark or light on MRI scans?
Dark
Is air dark or light on a T1 MRI?
Dark
Is air dark or light on a T2 MRI?
Dark
Is fat dark or light on a T1 MRI?
Light
Is fat dark or light on a T2 MRI?
Dark
Is fluid dark or light on a T1 MRI?
Dark
Is fluid dark or light on a T2 MRI?
Light
What is the most inferoposterior lobe of the cerebrum?
Occipital
What is the most superoposterior lobe of the cerebrum?
Parietal
In which MRI sequence would white matter appear darker than grey matter?
T2
What does TAC stand for in the Bamford/Oxford stroke classification?
Total anterior cirulation
What does PAC stand for in the Bamford/Oxford stroke classification?
Partial anterior circulation
What does LAC stand for in the Bamford/Oxford stroke classification and what arteries are affected in a lacunar stroke?
Lacunar
Penetrating arteries
What does POC stand for in the Bamford/Oxford stroke classification?
Posterior circulation
Is CT or MRI primarily used for stroke imaging?
CT
In a haemorrhagic stroke, would the main bleed appear bright or dark?
Bright
In an ischaemic stroke, would the main bleed appear bright or dark?
Dark
In an ischaemic stroke, would the thrombus appear bright or dark?
Bright
Do acute haemorrhages appear brighter or darker than chronic ones in a CT?
Brighter
In what kind of haemorrhage would the blood outline the sulci and gyri of the cerebrum?
Subarachnoid
Which kind of intracranial haemorrhage is almost always caused by trauma and would be characterised by unconsciousness following a lucid interval?
Extradural
What does ‘contrecoup’ mean in terms of a coup-contrecoup injury?
Contralateral subdural or subarachnoid haemorrhage due to trauma
