Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is interval improvement in bilateral diffuse interstitial opacities . Persistent bibasilar opacities noted . Metallic stent projects over the lower mediastinum . Stable cardiomegaly . No pleural effusion or pneumothorax noted . Bony thorax is stable .
    OUTPUT:
    
Interval improvement in bilateral diffuse interstitial and bibasilar opacities , likely improving pulmonary edema . No pleural effusions . The rest of the findings are stable .