Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion or pneumothorax is present . There is marked gaseous distention of the stomach . No acute osseous abnormality is seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .