Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pulmonary edema is mild and new since ___ . Increased opacity at left lung base is either atelectasis and / or combination of atelectasis and edema . Left pleural effusion is presumed and small and is also new since ___ . Heart size is normal . Cardiomediastinal silhouette is unremarkable . Mild - to - moderate atherosclerotic calcification is present in the aortic arch .
    OUTPUT:
    
Mild pulmonary edema and presumed small left pleural effusion , new since ___ .