Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared ___ radiograph , lung volumes remain low . Cardiomediastinal contours are within normal limits . Bronchial wall thickening appears chronic . No focal areas of consolidation to suggest pneumonia .
    OUTPUT:
    
Chronic bronchial wall thickening favors chronic bronchitis or bronchiectasis . No definite pneumonia .