Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded . Subtle reticular interstitial markings at the bases have significantly improved . No new focal opacity . No pleural abnormality . Heart size is normal . Cardiomediastinal and hilar silhouettes are unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality . Bibasilar reticular interstitial markings are improved , possibly reflecting NSIP response to treatment .