Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube remains in unchanged position . Right PICC tip is in the mid SVC . Heart size is normal . Mediastinal and hilar contours are unchanged . Lung volumes are low with diffuse interstitial opacities compatible with chronic interstitial lung disease , not substantially changed in the interval . No definite new areas of focal consolidation , pleural effusion or pneumothorax are visualized . No acute osseous abnormalities are present .
    OUTPUT:
    
No substantial interval change from the prior study . Diffuse interstitial lung opacities compatible with chronic interstitial lung disease .