investigations Flashcards
1
Q
What are the major advantages of CT
A
fast, cheaper simpler, less sensitive to motion, good at detecting calcification/foreign bodies, suitable for most patients
2
Q
What are the advantages of MRI
A
No ionising radiation, better resolution of soft tissue
3
Q
How does PET scan work
A
detects metabolic changes before structural once • Maps brain biochemistry using positron emitting radiopharmaceuticals
4
Q
what is evoked potential used for
A
potential evoked in one of the senses tom measure neuronal changes => time relation allows distinguishing from background
5
Q
give examples of evoked potential techniques
A
visual => mononuclear visual stimuli from chalkboard pattern, auditory clicks;
6
Q
What can be measured by electromyography
A
nerve conduction=> motor or sensory nerves
