Brain Scans
PET and MRI scan
- Created by: georgiasadler
- Created on: 08-05-14 17:25
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- BRAIN SCANS
- PET SCAN
- Positron Emission Tomography
- Image of 'working brain'
- Injected with glucose or water
- Labelled with radioactive tracer
- Substance reaches brain
- Brain cells uptake oxygen and tracer starts to decay
- Emits positrons
- The more glucose/oxygen the brain cells use up, the more positrons will be emitted in that area
- Emits positrons
- Brain cells uptake oxygen and tracer starts to decay
- Emitted positrons collide with electrons
- Form gamma rays
- Detected by scanner
- Form gamma rays
- Head is inside scanner
- Injected with glucose or water
- Image of 'working brain'
- Positron Emission Tomography
- MRI SCAN
- Magnetic Resonance Imaging
- Shows the structure of the brain
- Large scanner
- Very strong magnetic field passed through head
- Electromagnetic waves passed through body by magnet
- Very strong magnetic field passed through head
- Nuclei of some atoms spin a certain way when placed in a magnet
- Allows a detailed image of brain to be produced on computer
- Nuclei of hydrogen molecules emit their own radio wave at a frequency that the scanner picks up
- Large scanner
- Shows the structure of the brain
- Magnetic Resonance Imaging
- PET SCAN
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