Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . There is enlargement of the central pulmonary arteries suggestive of underlying pulmonary arterial hypertension . The aorta is tortuous . The cardiac silhouette is normal in size . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No focal consolidation . Enlargement of the central pulmonary arteries , suggesting the possibility of underlying pulmonary arterial hypertension .