RESUMEN
A study was made of the roentgenomorphological and roentgenofunctional appearance of pulmonary lesions in 120 patients with head and neck tumors during radiation therapy. Laryngeal cancer was diagnosed in 56 patients, cancer of the oral cavity in 48, and neck tumors in 16 patients. X-ray examination was done 1 month before and after the termination of gamma-beam radiotherapy, the summary focal doses varying from 40 to 75 Gy. The chief modes of lung examination were roentgenography and roentgenopneumopolygraphy. It was established that even before treatment the patients had latent signs of respiratory insufficiency. Radiotherapy, irrespective of the summary focal dose value, had a mediated effect on the lungs. One month after the discontinuation of radiotherapy the pulmonary pattern changed: its elements were enhanced and dilated, the general biomechanism of respiration impaired, particularly at the expense of reducing the respiratory mobility of the diaphragm and mediastinum, disorders of the bronchopulmonary ventilation increased. A multimodality x-ray study including roentgenopneumopolygraphy helps to detect in time regional disorders of lung function which is very important for prevention of lung complications.
Asunto(s)
Neoplasias de Cabeza y Cuello/radioterapia , Pulmón/efectos de la radiación , Traumatismos por Radiación/fisiopatología , Adulto , Anciano , Femenino , Neoplasias de Cabeza y Cuello/fisiopatología , Humanos , Pulmón/diagnóstico por imagen , Pulmón/fisiopatología , Masculino , Persona de Mediana Edad , Traumatismos por Radiación/diagnóstico por imagen , Traumatismos por Radiación/etiología , Radiografía , Pruebas de Función Respiratoria , Factores de TiempoRESUMEN
A new device is developed to trigger automatically an X-ray unit at the instant of the extremum respiratory phase. The device is driven by a probe sensing the air stream. The serviceability of the unit has been tested in the course of pneumopolyradiographic and pneumotetraradiographic examinations in more than 5000 patients. The unit is recommended for clinical application in the X-ray departments.