Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is hyperinflation of the lungs , which is unchanged . The cardiac , mediastinal and hilar contours are within normal limits . The pulmonary vascularity is not engorged . Interstitial opacities within the upper lobes bilaterally are stable , compatible with scarring . Lungs are clear . No pleural effusion or pneumothorax is identified . A TIPS catheter is seen within the right upper quadrant .
    OUTPUT:
    
No acute cardiopulmonary abnormality .