Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unremarkable cardiomediastinal and hilar contours . Increased prominence of bibasilar prominence of the interstitium likely reflecting chronic changes due to smoking . Lungs are otherwise clear . No pleural effusion or pneumothorax evident . There is stable irregular thickening of the right apex , unchanged compared to ___ . Minimal degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
No pneumonia . Chronic appearing interstitial prominence likely due to smoking .