Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is unchanged . There is mild pulmonary edema which is relatively asymmetric and worse at the right lung base , unchanged . Small bilateral pleural effusions . Hyperinflation of the lungs is noted .
    OUTPUT:
    
Mild pulmonary edema . Asymmetric opacity at the right lung base is unchanged from the prior examination and may represent asymmetric pulmonary edema , however underlying infection can not be excluded .