Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Interstitial and reticular opacities predominantly at the lung bases bilaterally is compatible with a chronic interstitial lung disease with fibrosis and honeycombing . Heart size is mildly enlarged . Mediastinal and hilar contours are unremarkable . There is crowding of bronchovascular structures without overt pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is present . There are no acute osseous abnormalities . No subdiaphragmatic free air is present .
    OUTPUT:
    
No subdiaphragmatic free air . Chronic interstitial lung disease with fibrosis , findings which can be better characterized with high - resolution chest CT if not done previously .