Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . Overlying EKG leads are present . The lungs are clear without signs of pneumonia or CHF . No effusion or pneumothorax . Cardiomediastinal silhouette is normal . No acute bony abnormality is seen . Bilateral AC joint arthropathy noted .
    OUTPUT:
    
No signs of pneumonia .