Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube tip terminates approximately 5 cm from the carina . Nasogastric tube tip is within the stomach . The heart size is normal . The mediastinal and hilar contours are unremarkable . Patchy opacity in the retrocardiac region may reflect atelectasis . No pleural effusion or pneumothorax is seen . The right lung is grossly clear . There is no pulmonary vascular congestion . No acute osseous abnormalities seen .
    OUTPUT:
    
Endotracheal tube and nasogastric tube tips are in standard positions . Patchy retrocardiac opacity may reflect atelectasis .