Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiomediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . A right inferior catheter terminating in the right atrium is slightly lower in position compared to the previous exam .
    OUTPUT:
    
No acute intrathoracic process .