1 PET Scans Lesson Objectives: Describe how PET scans are used.

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Presentation transcript:

1 PET Scans Lesson Objectives: Describe how PET scans are used

2 Revision.. n Name the different types of nuclear radiation that can occur. n What is anti-matter? n What happens when an anti-particle and a particle meet each other?

3  + Decay Neutron-deficient isotopes can decay by emitting positrons + Neutron retained by the nucleus positron Net effect: one proton replaced by neutron neutron positron positron

4 Non-invasive Medical Imaging Techniques MRI ( Magnetic Resonance Imaging) - uses a magnetic field CAT X-RayMRI CAT – ( Computerised Tomography) - uses X-rays

5 Positron Emission Tomography - Do not show anatomy of the body - Only processes which are going on

Nucleus Neutrons Protons Electrons Positron (  + ) Decay 18 F-FDG emits positrons

7 PET 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

8 Task n The following sentences on your worksheet have been jumbled up. Cut them out and rearrange them to describe how a PET scan works. n When you are sure they are in the correct order stick them in your book.

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