title: Preparation of [1-11C]acetate--an agent for the study of myocardial metabolism by positron emission tomography.
abstract: A method of obtaining an injectable solution of acetate labelled in the carboxyl group with the short-lived positron-emitting radionuclide, 11C (t12 = 20.4 min), is described. In the method labelling is achieved via the carbonation of freshly prepared methylmagnesium bromide with 11C-labelled carbon dioxide produced by the 14N(p, alpha)11C nuclear reaction. The method is fast (20 min) and produces sterile, apyrogenic [1-11C]acetate in high radiochemical yield (72 +/- 12%) and in high specific activity (greater than 18.5 GBq/mumol: greater than 0.5 Ci/mumol). The radiochemical purity of the radiopharmaceutical was found to exceed 95% by thin layer and high pressure liquid chromatography. Evidence presented shows that [1-11C]acetate has considerable value as an agent for investigating myocardial metabolism by positron emission tomography.
mesh_terms: D000085:Acetates; D002250:Carbon Radioisotopes; D003327:Coronary Disease / Q000000981:diagnostic imaging*; D006801:Humans; D007553:Isotope Labeling / Q000379:methods; D009206:Myocardium / Q000378:metabolism*; D014055:Tomography, Emission-Computed
chemical_list: D000085:Acetates; D002250:Carbon Radioisotopes