Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . Mediastinal contours are unremarkable . There is mild perihilar haziness and vascular indistinctness compatible with mild interstitial pulmonary edema . Small bilateral pleural effusions persist . Retrocardiac opacity likely reflects atelectasis . There is no pneumothorax . No acute osseous abnormalities are present .
    OUTPUT:
    
Mild pulmonary edema and small bilateral pleural effusions . Retrocardiac atelectasis .