Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly . The mediastinal and hilar contours are normal . There is calcification of the aorta , indicating atherosclerosis . There is prominence of the main pulmonary artery . The pulmonary vasculature is otherwise normal . There is bibasilar atelectasis . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . There is mild elevation of the right hemidiaphragm .
    OUTPUT:
    
Cardiomegaly with prominence of the main pulmonary artery contour , correlate for pulmonary arterial hypertension . Otherwise unremarkable . Please refer to subsequent CTA of the chest for further details .