[Technique of the x-ray examination of the lungs (author's transl)].

Thorax radiography with high kilovoltage technique in 2 planes is the basis for lung examination. In case of special on-target problems additional x-ray films will be necessary. The aim must always be to obtain an image of the details which are essential for proper diagnosis, showing the fine structures of the relevant area. Among the important image parameters are the visualisation of the fine vessels in the lung periphery and on the costopleural margin from the apex of the lung to the diaphragm; the sharp image of the central pulmonary vessels, of the cardiac margin and the diaphragm; and the recognisability of the retrocardiac vessels. The article discusses the anatomicophysiological conditions, the technical requirements and the demands to be made on the medical assessment of the findings.