In-target produced [11C]methane: Increased specific radioactivity

Appl Radiat Isot. 2009 Jan;67(1):106-10. doi: 10.1016/j.apradiso.2008.09.010. Epub 2008 Oct 5.

Abstract

The (14)N(rho, alpha)(11)C reaction on N(2)-O(2) or N(2)-H(2) gaseous systems as targets in proton bombardment allows for the production of [(11)C]CO(2) and [(11)C]CH(4.) We report the target production of [(11)C]CH(4) and the gas phase iodination to produce [(11)C]CH(3)I with high specific radioactivity (SA). SA was calculated for four different radiopharmaceuticals produced in-house from both target produced [(11)C]CO(2) and [(11)C]CH(4.) For [(11)C]raclopride we obtained an average SA of 3908 GBq/mumol (106000 Ci/mmol) at the end of bombardment for the last 52 productions, which is a 32-fold increase compared to when using the in-house [(11)C]CO(2) target.

MeSH terms

  • Carbon Dioxide / chemistry*
  • Carbon Radioisotopes*
  • Gases
  • Halogenation
  • Hydrocarbons, Iodinated / chemical synthesis
  • Isotope Labeling / methods*
  • Methane / chemistry*
  • Raclopride
  • Radioactivity
  • Radiopharmaceuticals

Substances

  • Carbon Radioisotopes
  • Gases
  • Hydrocarbons, Iodinated
  • Radiopharmaceuticals
  • Carbon Dioxide
  • Raclopride
  • methyl iodide
  • Methane