Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is moderately enlarged . The mediastinal contour is unchanged . There is mild interstitial pulmonary edema . Opacification within the retrocardiac region could reflect atelectasis or pneumonia . Probable trace bilateral pleural effusions are present . There is no pneumothorax . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
Mild interstitial pulmonary edema and small bilateral pleural effusions . Retrocardiac opacity may reflect atelectasis or pneumonia in the correct clinical setting .