Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Lungs appear clear , though lung volumes are low . No definite sign of pneumonia or CHF . No pleural effusion or pneumothorax . Heart and mediastinal contour appear normal . An old left mid rib cage deformity is again noted . Bony structures are otherwise unremarkable .
    OUTPUT:
    
No signs of pneumonia or CHF .