[Contribution of radiological and radioisotope technics to the study of lung physiopathology].

Reference is made to the problems posed by the physiopathology of the senile lung and the manifold effects of structural deformities. A comparison is made between the possibilities offered by radiological techniques and the quantitative and qualitative evaluation of scintiscans obtained after the perfusion of 131I MAA. Examination of the data from healthy subjects of various ages and those from patients with obstructive bronchopathy and emphysema showed that uniform distribution of the isotope can generally be expected in 2/3 of subjects with "senile lung". Uneven borders and occasionally irregular distribution of radioactivity were noted in the remainder.