Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . Cardiac , mediastinal and hilar contours are normal . Lungs are clear . No pleural effusion or pneumothorax is present . No displaced rib fractures are present . Cholecystectomy clips are noted in the right upper quadrant of the abdomen .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No displaced rib fractures identified .