F-18 fluorodeoxyglucose

F-18 fluorodeoxyglucose (FDG) is the most common PET radiotracer.

The radiopharmaceutical consists of the fluorine-18 radionuclide substituting the hydroxyl group at the C-2 position of glucose. The IUPAC chemical name is 2-deoxy-2-[F-18]fluoroglucose.

F-18 fluoride ion is created in a cyclotron and then converted via an automated chemistry module into F-18 FDG. Specifically, F-18 FDG is produced through a nucleophilic substitution reaction, using the F-18 fluoride by nuclear reaction 18O (p,n) 18F starting from water (H2O) enriched with oxygen-18.

  • physical half-life: 110 minutes
  • excretion: renal

Physiologic activity is commonly seen in the following organs:

  • brain
  • heart (especially left ventricular myocardium)
  • kidneys and bladder (due to urinary excretion)
  • liver (often used as an internal reference standard on whole body scans)

Other sites of physiologic uptake are variable or less intense:

Imaging technology

Article information

rID: 73056
Synonyms or Alternate Spellings:
  • Fluorine-18 FDG
  • F-18 fluorodeoxyglucose (FDG)
  • 2-Deoxy-2-[18F]fluoroglucose
  • Fluorodeoxyglucose F 18
  • Fluorodeoxyglucose (18F)
  • Fluorine-18 fluorodeoxyglucose
  • Fludeoxyglucose (18F)
  • 18F Fluorodeoxyglucose
  • Fluorodeoxyglucose F18
  • Flucis
  • F-18 FDG
  • 2-Fluoro-2-deoxy-D-glucose
  • FDG
  • 18F-FDG
  • (18F)FDG
  • 18FDG
  • Fluorodeoxyglucose
  • Fludeoxyglucose

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Normal F-18 FDG PET-CT
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.