Misdiagnosed radiographs included pneumothorax by 11 % of participants , free air under the diaphragm by 41 % , bronchial perforation from a nasogastric tube by 28 % , right mainstem intubation by 20 % , superior vena cava perforation from a central venous catheter by 31 % , normal film by 75 % , negative pressure pulmonary edema by 16 % , left lower lobe collapse by 80 % , pulmonary infarction from a pulmonary artery catheter by 29 % , and tension pneumothorax by 41 % .
