Scanning
- Created by: Sian
- Created on: 02-06-13 21:12
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- Scanning
- MRI
- Allows the structure of the brain to be seen, therefore whether there is damage.
- They are placed under a large scanner where a magnetic field is passed through their head.
- Hydrogen concentrations vary in different area's of the brain, using this a detailed image can be made.
- Nuclei of atoms spin in a particular way when placed in a magnetic field.
- PET
- Produces an image of the activity in the brain.
- Can show malfunctioning parts of the brain.
- patients given an injection of of either glucose or water labelled with a radioactive tracer.
- As the tracer decays it emits positrons.
- The more glucose or water taken up the more positrons are released so the more active that part of the brain is.
- The positrons collide with elctrons forming gamma rays which are detected by a scanner.
- MRI
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