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PET Scans

PET Scans. Lesson Objectives: Describe how PET scans are used. 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?. +. +. +. +. +. +. +. +. +. +.  + Decay.

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PET Scans

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

  2. 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?

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

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

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

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

  7. PET Imaging • Inject radioisotope • Measure gamma-ray emissions from isotope • Sensors detect the gamma rays • Computes create a picture to show the position of the source

  8. Task • 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.

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