Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral reticulonodular opacities appear worsened compared with the recent radiograph ___ . There has also been worsening of pulmonary edema . However , superimposed infection can not be excluded . Heart size and mediastinum are stable . No pneumothorax is identified .
    OUTPUT:
    
Interval worsening pulmonary edema and bilateral reticulonodular opacities , for which superimposed infection can not be excluded .