To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. Fig 1 Frequency distribution of atelectasis area during general anaesthesia. Fig 2 Examples of atelectasis during general anaesthesia. (a) A 25-yr-old patient with well-aerated lungs without signs of atelectasis. The grey/white area in the right lung field is the top of the diaphragm dome, and the radiating beams are caused by a cardiac catheter.