Fig. 1
From: Significant incidental cardiac disease on thoracic CT: what the general radiologist needs to know
a Large ostium secundum ASD (black arrow) in a 51-year old female who was being investigated for cause of pulmonary hypertension. RA right atrium, LA left atrium. b The patient also had large central pulmonary arteries demonstrated by thoracic CT. MPA main pulmonary artery