Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size is normal . Diffuse tubular branching opacities larger in the upper lobes right greater than left are grossly unchanged . There are no new lung abnormalities . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Findings consistent with chronic changes of cystic fibrosis with impacted bronchiectasis . Superimposed infection is possible .