Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no significant interval change compared to exam from six hours prior with a persistent diffuse interstitial lung process . Cardiomediastinal silhouette and hilar contours are stable . There is no large effusion or pneumothorax . Endotracheal tube is appropriately positioned . There is no subdiaphragmatic free air .
    OUTPUT:
    
No significant interval change compared to six hours prior . No subdiaphragmatic free air .