Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is enlarged but stable in size . Prominence of the central pulmonary arteries is suggestive of pulmonary arterial hypertension with increased size of pulmonary artery evident on prior CT of ___ . Lungs and pleural surfaces are clear , and there are no acute skeletal findings .
    OUTPUT:
    
No evidence of pneumonia .