Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One portable semi-erect AP view of the chest . There is no evidence of free air . The lungs are clear . The cardiac , mediastinal , and hilar contours are normal . There is no evidence of pleural effusion or pneumothorax . Hiatal hernia is better seen on concurrent CT from today .
    OUTPUT:
    
No acute cardiopulmonary process . No free air .