Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube is appropriately positioned . An esophageal probe is again seen . Right internal jugular catheter terminates in the mid SVC . Left PICC has been repositioned and now terminates at the cavoatrial junction . A nasogastric tube extends into the stomach . Heart size is normal . Mediastinal and hilar contours are unchanged . Interval improvement in bilateral perihilar opacities . Interval improvement in left retrocardiac opacity .
    OUTPUT:
    
Interval improvement in bilateral perihilar opacities .