Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . The lungs are hyperinflated , compatible with patient 's known history of emphysema . The heart size is top normal . There are ill - defined bilateral diffuse interstitial opacities compatible with mild - to - moderate interstitial pulmonary edema . There are small bilateral pleural effusions increased in size when compared to the prior study . No pneumothorax is identified . More focal bibasilar opacities may represent atelectasis but infection can not be completely excluded . No pneumothorax is present .
    OUTPUT:
    
Mild - to - moderate interstitial pulmonary edema with small bilateral pleural effusions and bibasilar airspace opacities , likely atelectasis .