Assuntos
Morte Súbita/veterinária , Traumatismos por Eletricidade/veterinária , Paralisia/veterinária , Doenças dos Suínos/etiologia , Animais , Morte Súbita/etiologia , Traumatismos por Eletricidade/etiologia , Feminino , Fraturas do Fêmur/etiologia , Fraturas do Fêmur/veterinária , Fraturas do Colo Femoral/etiologia , Fraturas do Colo Femoral/veterinária , Vértebras Lombares/lesões , Paralisia/etiologia , Ossos Pélvicos/lesões , Sacro/lesões , Fraturas da Coluna Vertebral/etiologia , Fraturas da Coluna Vertebral/veterinária , SuínosRESUMO
The authors describe a rectilinear scanner-head assembly containing an x-ray tube and a Si(Li) detector developed to stimulate and detect fluorescence from intrinsic iodine in the thyroid. Various operational parameters were evaluated. Because of the abundant supply of photons, a scanning distance of 3 inches (7.62 cm) could be used. The full width at half maximum at this distance was 0.52 cm. Optimal exposure was obtained at 80 kVp, 0.5 mA with a copper-aluminum filter combination. The scanner with an x-ray generator appears to be a workable alternative to imaging devices using long-lived radionuclide sources.
Assuntos
Fluorescência , Tecnologia Radiológica/instrumentação , Humanos , Radiografia , Cintilografia , Tecnologia Radiológica/métodos , Glândula Tireoide/diagnóstico por imagemRESUMO
Fluorescent imaging of the thyroid was performed successfully in 43 patients with incident low-energy photons generated by an x-ray tube. The images were comparable in quality and information content to those obtained with 123l or 99mTc pertechnetate. The estimated absorbed radiation dose to the gland is approximately 40 mrads. Fluorescent imaging is a clinically useful means of evaluating the thyroid.