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6. Which is NOT a drawback of CT?
- identifies the major tissues
- less detailed picture
- uses x-rays
7. A CT scan uses tiny x-rays, true or false?
- false - no x-rays are used, it is a camera
- true - they are reduced in strength by density of the tissue they pass through and then detected to form a picture
- true - they are reflected by tissue according to its colour and detected to form a picture
- false - magnetic rays are used instead
8. What can be used to make the tissue more visible during a CT scan?
- dyes
- a dark room
- morphine
- water
9. What does fMRI enable?
- watching areas of the brain in action
- healing of the brain without surgery
- quicker scanning than MRI
10. MRI scans use magnetic fields to create and image, true or false?