1 pet scans lesson objectives: describe how pet scans are used
TRANSCRIPT
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Revision..Revision..
Name the different types of nuclear radiation that can occur.
What is anti-matter?
What happens when an anti-particle and a particle meet each other?
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++ Decay Decay
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Neutron-deficient isotopes can decay by emitting Neutron-deficient isotopes can decay by emitting positronspositrons
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Neutron retained by the nucleusNeutron retained by the nucleus
positronpositron Net effect: one Net effect: one proton proton replaced by replaced by
• neutronneutron• positronpositron
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Non-invasive Medical Imaging Techniques
Non-invasive Medical Imaging Techniques
MRI (Magnetic Resonance Imaging) - uses a magnetic field
CAT
X-Ray
MRICAT – (Computerised Tomography) - uses X-rays
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Positron Emission TomographyPositron Emission Tomography
- Do not show anatomy of the body
- Only processes which are going on
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NucleusNucleus
NeutronsNeutrons
ProtonsProtons
ElectronsElectrons
Positron (Positron (++) Decay) Decay
18F-FDG
emits positrons
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PET ImagingPET Imaging
1. Inject radioisotope
2. Measure gamma-ray emissions from isotope
3. Sensors detect the gamma rays
4. Computes create a picture to show the position of the source
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TaskTask
The following sentences on your worksheet have been jumbled up. Cut them out and rearrange them to describe how a PET scan works.
When you are sure they are in the correct order stick them in your book.