Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph obtained . Lungs are clear bilaterally . No signs of pneumonia or CHF . No effusion or pneumothorax . Cardiomediastinal silhouette is normal . No free air below the right hemidiaphragm . Bony structures are intact .
    OUTPUT:
    
No acute findings in the chest . No free air .