Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . Increased interstitial opacities are noted within both lung bases as well as within the periphery bilaterally , compatible with chronic interstitial lung disease , previously characterized on chest CT as NSIP . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is seen .
    OUTPUT:
    
Chronic interstitial lung disease , previously characterized on chest CT as NSIP , not substantially changed from the previous radiograph . No acute cardiopulmonary abnormality otherwise demonstrated