Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval improvement of the mild interstitial edema . There is persistent bibasal heterogeneous opacities , likely atelectasis . The heart remains moderately enlarged with a single lead defibrillator in standard position . No pneumothorax . There are persistentlucencies at both hemidiaphragm , likely from streaks of atelectasis .
    OUTPUT:
    
Improved interstitial pulmonary edema .