Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pleural effusion or pneumothorax is present . Vertebral body heights are well preserved . No definite rib fractures are noted .
    OUTPUT:
    
No acute intrathoracic process .