[Pulmonary throboembolism: radiological examination without contrast media. (Findings in 70 cases)]

The results are reported of radiologic investigations carried out without contrast medium in 70 selected patients with pulmonary thromboembolisms. The frequency of different signs is reported. Attention is stressed of the following data: 1) value of some semeiologic findings both hilar (hilar amputation, arterial dilation) and parenchimal (increased translucency, hypoperfusion), mainly compared with previous radiographic examinations; 2) frequency of atelectasis with its various findings; 3) significance of the evolution referred both to the infarction and the thromboembolic pattern.