Brain Scans Flashcards
1
Q
CAT scans meaning
A
A series of x-rays taken to produce 2 or 3 dimensional pictures of the brain.
2
Q
CAT scan: positives
A
- Quality of images are high
- Useful to detect structural abnormalities
3
Q
CAT scan: negatives
A
- Radiation exposure increases
- Only structural information shown
4
Q
MRI scans meaning
A
Using a magnetic field that causes the atoms of the brain to change, giving a map of the structure of the brain,
5
Q
MRI scan: positives
A
- Magnetic field rather than radiation
- Patient can have multiple scans
6
Q
MRI scan: negatives
A
- Takes a long time
- Can be uncomfortable for the patient
7
Q
PET scans meaning
A
Injected with radioactive glucose (sugars) to detect active areas.
8
Q
PET scan: positives
A
- Reveals chemical information
- Distinguish benign and malignant tumors
9
Q
PET scan: negatives
A
- Costly + limited availability
- Injection = only a few times
- Less precise that CAT + MRI
