Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is enlarged but stable from the prior exam . There is pulmonary vascular engorgement and mild pulmonary edema . A more focal opacity the base of the left lung may represent a focus of atelectasis or infection . No pneumothorax or pleural effusion .
    OUTPUT:
    
Mild pulmonary edema with a more focal opacity at the base of the left lung which may reflect atelectasis or infection in the appropriate clinical setting .