Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the chest radiographs obtained ___ , no significant changes are appreciated . Unchanged , hazy opacification in the lower left lung is probably due to a large pericardial fat pad . A crescentic area of scarring and atelectasis in the left upper lung is unchanged or minimally improved . The right lung is fully expanded and clear . Cardiomediastinal hilar silhouettes are unremarkable .
    OUTPUT:
    
No radiographic evidence of pneumonia or other significant cardiopulmonary abnormalities .