RESUMO
Antero-posterior radiographs of the larynx lack spatial and temporal resolution, due to the movement of the vocal folds during phonation. By utilising the electrolaryngograph to monitor vocal fold movement, single X-ray pulses of 30 nanoseconds duration have been triggered at pre-determined points during the cycle of vocal fold movement to visualise these in normal phonation.
Assuntos
Movimento , Prega Vocal/diagnóstico por imagem , Feminino , Humanos , Masculino , Fonação , Radiografia , Tecnologia Radiológica , Fatores de Tempo , Prega Vocal/fisiologiaRESUMO
Cats infected with Brugia pahangi were immunosuppressed and the development of lymphatic pathology, as measured xeroradiographically by dilatation of the vessels, in these animals was compared with that of normally infected cats. Individual cats showed wide variations in response. Niridazole and antilymphocyte serum both reduced dilatation, niridazole being particularly effective in the early stages of infection. When silica, used as an inflammatory agent, was injected subcutaneously in conjunction with worm infection lymphatic dilatation developed, this being potentiated in degree and rate of development as compared with control animals. The possible role of a non-filarial inflammatory response in the development of lymphatic dilatation is discussed.
Assuntos
Filariose/imunologia , Imunossupressores/farmacologia , Sistema Linfático/patologia , Dióxido de Silício/farmacologia , Animais , Soro Antilinfocitário , Brugia , Gatos , Feminino , Filariose/patologia , Inflamação , Linfografia , Masculino , Niridazol/farmacologia , XerorradiografiaRESUMO
Adequate assessment of disease extent is vital for tumour control in the larynx. Xeroradiography using a tomographic technique was investigated. A preliminary study was carried out to assess the optimum technique and exposure. It was also found that the radiation dose to the skin, although just over twice that for film, could be halved by the removal of the secondary radiation grid. Images of 24 patients treated were assessed for soft tissue and bony detail, and it was found that the xerotomograms were beneficial to the radiotherapy planning of the treatment volume of laryngeal and related neck carcinomas.