Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slight asymmetric increased opacity in the right infrahilar region may reflect an early bronchopneumonia versus atelectasis . Retrocardiac streaky opacities are probably atelectasis . No edema , pleural effusion , or pneumothorax . The heart is normal in size . The mediastinum is not widened . No acute osseous abnormality . Surgical clips project over the right upper quadrant , suggesting prior cholecystectomy .
    OUTPUT:
    
Slight asymmetric increased opacity in the right infrahilar region could reflect an early bronchopneumonia versus atelectasis .