Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains mildly enlarged . Mediastinal and hilar contours are unchanged . There is no pulmonary vascular congestion . Re - demonstrated are patchy opacities within both lung bases , slightly progressed in the interval . No pleural effusion or pneumothorax is seen . Mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Slightly worse bibasilar patchy airspace opacities which are concerning for infection in the correct clinical setting .