Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tip of the endotracheal tube is not definitively visualized , but likely terminates approximately 5 cm above the carina . Nasogastric tube extends into the stomach . Cardiomediastinal and hilar contours are normal . There is stable hyperinflation of the lungs bilaterally . Stable , increased lucency at the lung bases is suggestive of alpha - 1 antitrypsin deficiency . Linear densities in the peripheral right mid lung may reflect subsegmental atelectasis . There is no pneumothorax . There is no pneumonia .
    OUTPUT:
    
1 . Stable , hyperinflation of the lungs bilaterally , consistent with known COPD . Basal predominant lucency is suggestive of alpha - 1 antitrypsin deficiency . 2 . No acute cardiopulmonary abnormality .