Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . The heart size is normal . The mediastinal hilar contours are normal . There is no pleural effusion or pneumothorax . There is a small to moderate hiatal hernia . Partially imaged fixation screws are seen in the proximal left humerus .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Small to moderate hiatal hernia .