Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest when compared to the prior study demonstrate interval improvement in bibasilar opacities . No focal areas of consolidation are noted . The cardiac contour is top normal . The mediastinum is normal . No hilar lymphadenopathy is appreciated . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
No evidence of pneumonia .