Tc-99m DTPA (aerosol)

Andrew Murphy and Dr Jeremy Jones et al.

Tc-99m DTPA (diethylenetriamine-pentaacetic acid) (aerosol) is one of the technetium agents and is used in VQ imaging.


  • photon energy: 140 KeV
  • physical half life: 6 hours
  • biological half life: 1 hour
  • normal distribution: lungs
  • pharmacokinetics:
    • aerosol deposited in bronhoalveolar spaces and diffuses into capillaries
  • excretion: renal
  • target organ: lungs

Uses, doses and timings

  • V/Q ventilation
    • adult dose: 1.11 GBq (30 mCi), (1.665 GBq (45 mCi) if after perfusion) in 3 mL saline nebuliser
    • timing: image immediately for 5 minutes
Imaging technology

Article information

rID: 15565
System: Chest
Synonyms or Alternate Spellings:
  • Tc-99m diethylenetriamine-pentaacetic acid
  • Tc-99m diethylenetriamine-pentaacetic acid (DTPA)

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