Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right pigtail catheter is in stable position along the right lung base . No appreciable right pneumothorax is seen . Hyperinflation of the lungs reflects COPD . Increased markings are seen in the lung bases as before . The lungs are otherwise clear of focal consolidation , pleural effusion or overt pulmonary edema . The heart is normal in size . Surgical clips noted in right upper quadrant .
    OUTPUT:
    
Stable position of right chest tube without appreciable pneumothorax .