Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heterogeneous bilateral lower lung opacities are slightly decreased changed compared to the prior study from ___ , likely atelectasis . There is unchanged mild interstitial pulmonary edema . Mild cardiomegaly is unchanged . The mediastinal contours are unchanged . Small bilateral pleural effusions are unchanged . There is no pneumothorax . A right upper abdominal quadrant catheter is noted .
    OUTPUT:
    
1 . Decreased bilateral lower lung opacities , likely atelectasis , although infection is not excluded . 2 . Mild interstitial pulmonary edema , unchanged . 3 . Unchanged mild cardiomegaly . 4 . Unchanged small bilateral pleural effusions .