Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged but unchanged . The aorta is tortuous . Mediastinal and hilar contours are otherwise stable with enlargement of the pulmonary arteries suggestive of underlying pulmonary arterial hypertension . Pulmonary vasculature is not engorged . Patchy opacities are demonstrated within the left lung base , similar compared to the previous exam . Calcified granuloma within the right lower lobe is unchanged . Curvilinear opacity within the right upper lobe is also unchanged , with no pleural effusion or pneumothorax identified . No acute osseous abnormalities seen .
    OUTPUT:
    
Patchy left basilar opacity may reflect atelectasis though infection can not be completely excluded . Persistently dilated pulmonary arteries suggestive of underlying pulmonary arterial hypertension .