title: C-11 dimethyloxazolidinedione (DMO): biodistribution, radiation absorbed dose, and potential for PET measurement of regional brain pH: concise communication.
abstract: An improved radiochemical synthesis for C-11 dimethyloxazolidinedione (C-11 DMO) makes this agent attractive for the measurement of regional brain tissue pH (rpH) using positron emission tomography (PET). Toward this end, biodistribution data for C-14 DMO in rats at various times after an intravenous bolus injection are reported, together with estimates of radiation absorbed dose for C-11 DMO in man. An error analysis of C-11 DMO PET measurement of rpH indicates that rpH can be determined to within +/- 0.1 pH unit for pH greater than 6.5 with a 20-mCi injected bolus of C-11 DMO, a 30- 45-min equilibration time, and a 15-min PET imaging period.
mesh_terms: D000818:Animals; D001923:Brain Chemistry; D002250:Carbon Radioisotopes; D004114:Dimethadione / Q000378:metabolism; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010080:Oxazoles; D011829:Radiation Dosage; D051381:Rats; D011919:Rats, Inbred Strains; D014018:Tissue Distribution; D014055:Tomography, Emission-Computed
chemical_list: D002250:Carbon Radioisotopes; D010080:Oxazoles; D004114:Dimethadione