Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diffuse prominence of the pulmonary interstitium , unchanged from prior studies compatible with chronic lung disease . There is no obvious superimposed pulmonary edema or pleural effusion . No focal consolidation concerning for pneumonia is detected . The cardiac silhouette is mildly enlarged but stable . The mediastinal and hilar contours are unchanged with prominence of the tortuous thoracic aorta . Calcification of the aortic knob is again seen .
    OUTPUT:
    
Chronic interstitial lung disease without superimposed acute cardiopulmonary process .