Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Mild interstitial abnormality , reflected in bronchial cuffing and generalized increase in lung attenuation and small irregular opacities , most pronounced in the left lower lung , is most commonly associated with cigaret smoking or chronic bronchitis . No focal lung lesions are present . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality . Mild interstitial lung abnormality and / or airway inflammation , usually chronic .