Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , without consolidation , pleural effusion or pneumothorax . Since the prior chest radiograph on ___ , there has been interval normalization of the heart size , suggestive of resolving pericardial effusion . Upper abdomen is unremarkable .
    OUTPUT:
    
1 . Clear lungs . 2 . Interval normalization of the heart size since ___ , suggestive of resolving pericardial effusion .