Brain Structure/scan

Question 1

How does MRI scan brain

Answer 1

MRI scans brain by:
Uses magnetic fields and radio waves to produce cross section of images
When radiowaves stop, nuclei of H atoms releases energy and amount released depends on density of tissue

Question 2

How does CT scan brain

Answer 2

CT scans brains by :
Uses radiation to produce cross section images of brain- X rays detected and used to produce image by computer
Dense structure absorb more radiation than less dense so show up as a lighter colour on scan

Question 3

What is CT scan used for

Answer 3

CT scan is used to monitor brain tissue over course of an illness

Question 4

What are adv and dis adv of MRI scan

Answer 4

Adv of MRI scan are:
gives good resolution
Non invasive
Dis adv of MRI scan are:
expensive
Not portable

Question 5

What are adv and dis adv of CT scans

Answer 5

Adv of CT scans are:
Non-invasive
Quick, can take 5mins
Produces detailed images
Dis adv of CT scans are:
Not portable
Exposes patient to radiation

Question 6

How can MRI investigate brain tumour

Answer 6

MRI can investigate brain tumours by:
Identify location of tumour
Size/type of tumour
Can monitor growth of tumour

Question 7

Why is MRI more useful than CT when identifying tumours

Answer 7

MRI is more useful than CT when identifying tumours because:
MRI gives better resolution so more detail can be seen
Doesn’t use X rays so safer and can be used more often

Question 8

What does cerebellum control

Answer 8

Cerebellum controls voluntary actions