science

How does nuclear medicine use short-lived isotopes for PET scans?

šŸ’” The Answer

  • Positron Emission Tomography (PET) uses positron-emitting isotopes like F-18.
  • A positron annihilates with an electron, producing two gamma rays in opposite directions.
  • Detectors record these gamma rays to localize the source and create 3D images.
  • Short half-lives require on-site production with cyclotrons.

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