Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy wires and prosthetic mitral valve are in unchanged positions . Lumbar kyphoplasty is again noted . Widened mediastinum and increased interstitial markings in bilateral perihilar regions are similar to before and consistent with interstitial lung disease which was better evaluated on prior CT . Lung volume is low . No new area of consolidation is identified . There is no pleural effusion or pneumothorax . Mildly enlarged cardiac silhouette is unchanged .
    OUTPUT:
    
No radiographic evidence of pneumonia . Chronic interstitial lung disease appears similar to ___ .