Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of endotracheal tube with tip at the level of the clavicles . The nasogastric tube has also been placed with tip at the GE junction , should be advanced several centimeters into the stomach . Unchanged mediastinal , hilar and cardiac silhouette . Increased retrocardiac opacifications likely represents left lower lobe collapse and possibly a small left pleural effusion . Though can not exclude developing infectious process .
    OUTPUT:
    
1 . Endotracheal tube well positioned . Nasogastric tube should be advanced several centimeters to terminate into stomach . 2 . Increased retrocardiac opacity likely representing left lower lobe collapse .