Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is unchanged and a small to moderate left pleural effusion is mildly decreased . Atelectasis at the right lung base is moderate . Pulmonary edema is mild . Osseous structures are unremarkable .
    OUTPUT:
    
Small to moderate left pleural effusion is mildly decreased . Pulmonary edema is mild .