Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Shallow inspiration accentuates heart size , pulmonary vascularity . Pulmonary vascularity has improved . Improved bilateral perihilar opacities , improving pneumonitis versus improving edema . Improved right basilar atelectasis . Increased retrocardiac opacity , atelectasis versus infiltrate . Small right pleural effusion is new . Probable small left pleural effusion , stable .
    OUTPUT:
    
Improving perihilar opacities . More prominent retrocardiac opacity , atelectasis likely ; consider pneumonitis in appropriate clinical setting .