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[The anteroposterior (a--p) X-ray-picture in lateral radiographic position in patients after thoracic surgery (author's transl)].

A new approach to the X-ray checking after chest operations is described. Instead of sitting upright the patient is lying on his nonoperated side, the operated side of the chest upward. By this way it is easy to differentiate pleural effusions from basal infiltrations of the remaining lung segments. Furthermore it is possible to check the diaphragm and the lateral portions of the lung much easier than with the conventional X-ray pictures taken in sitting position.