Abstract
Pulmonary function studies were made in 15 patients with unresectable bronchogenic carcinoma treated by split-course megavoltage radiation. Forced vital capacity and forced respiratory volume per second were measured before starting each of the 1st and 2nd phases of the split-course therapy and at 2 wk and 12 wk after completion of treatment. Improvement in ventilatory functions was noted in > 1/2 of the patients. Adverse effects on lung function appeared to be minimal.