RESUMO
Se describe un nuevo método para cuantificar la captación relativa del ventrículo derecho en los estudios de perfusión miocárdica. Se demuestra que el índice de captación propuesto está en relación con el grado de isquemia miocárdica en el ventrículo izquierdo.
A new method for quantification of relative right ventricular uptake in myocardial perfusion Studies is described. A direct relationship between the proposed uptake index and the degree of left ventricular myocardial ischemia is demonstrated.
Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Circulação Coronária , Função Ventricular Direita/fisiologia , Imagem de Perfusão do Miocárdio , Isquemia Miocárdica , Isquemia Miocárdica/fisiopatologia , Tomografia Computadorizada de Emissão de Fóton Único , Distribuição Tecidual , Compostos RadiofarmacêuticosRESUMO
Quality control of 188W/188Re generators from two different manufacturers and two levels of activity each, was carried out.Elution yields, chemical as well as radionuclidic and radiochemical purities, elution profiles along six months, were evaluated.Broad elution profile, high efficiency, with tandem alumina column added, ionic exchange column needed for increase of radionuclidic concentration were characteristics of type I generators.Easy handling with slightly lower yields and high concentrations of activity were observed in type II generators. Similar radionuclidic impurities namely 192Ir, 191Os, 188W, 110mAg, 54Mn, 134Cs and 60Co as well as similar radiochemical yields obtained in the labelling of 188 Re-HEDP were observed with eluates of both generator types.Absorbed doses to radiopharmacy staff were less important in type II generators.