Brain Scanning 3

Question 1

How can images be used to established what parts of brain have been damaged

Answer 1

Images can be established what parts of brain have been damaged by:
Using 3D images
Identifying Different shape
Different spdensity
Compare to normal brain and see differences

Question 2

What information from a scan can be useful to surgeon

Answer 2

Information from a scan that could be useful to surgeon is:
Size of tumour
Location of tumour
What brain functions might be affected if tumour removed

Question 3

Why can different abnormalities cause different symptoms

Answer 3

Different abnormalities can cause different symptoms because:
Found in different regions
Different regions of brain have different functions
And symptoms depend on region of brain affected

Question 4

Compare MRI and CT

Answer 4

MRI gives better resolution than CT
So CT can identify larger structures
MRI uses radiowaves whereas CT uses x ray
MRI is more expensive than CT

Question 5

Why is fMRI more useful than CT to study brain activity

Answer 5

fMRI is more useful than CT to study brain activity because:
fMRI views brain activity directly
High resolution 
Doesn’t need special dye
Safer as doesn’t use X rays

Question 6

Why do tumours show up white on MRI scan

Answer 6

Tumours show up white on MRI scan because
Tumour tissue differs from brain tissue
Radiowaves blocked by tumour