Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar opacities have increased since prior examination , right worse than left , likely a component of atelectasis and pleural effusion . There is also persistent retrocardiac opacity . An overlying infectious process can not be entirely exclude . The heart is enlarged , stable . There is mild pulmonary vascular congestion . There is no pneumothorax . There are degenerative changes of the thoracic spine .
    OUTPUT:
    
Bibasilar opacities , right worse than left , slightly worsened since prior examination , likely a combination of pleural effusion and atelectasis . However an overlying infectious process can not be entirely excluded .