Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pulmonary edema has improved since the prior exam . There is mild persistent vascular congestion . Bibasilar opacities , greater on the right , have improved and may represent atelectasis or residual pneumonia . No new focal consolidation or pleural effusion . Heart size and cardiomediastinal contours are stable . Left PICC terminates at the cavoatrial junction . Sternotomy wires are intact .
    OUTPUT:
    
Mild vascular congestion . Interval improvement of bibasilar opacities , which may represent improving atelectasis or resolving pneumonia .