A supine anteroposterior chest x-ray of one porcine model diagnosed with a basal right-sided pneumothorax. Although the chest anatomy between pigs and humans differ, the intrapleural distribution of air is similar with air collecting in the anteromedial and basal recesses. The radiological review of pneumothorax for humans was therefore also applied on our models. The radiologist interpreted each picture for a readily apparent visceral pleural line without distal lung markings, depressed diaphragm and the deep sulcus sign (i.e. enlargement of the costophrenic angle).