Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . This study suggests there may be at least trace pleural effusions . Parenchymal opacities have increased . Although these are somewhat more conspicuous in the right lower lung than elsewhere , likely etiology is pulmonary edema .
    OUTPUT:
    
Worsening parenchymal opacities suggesting moderate pulmonary edema . Although less likely developing pneumonia at the right lung base is not excluded .