Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to most recent prior exam , there has been little interval change . Right lower lung opacity is similar in extent but decreased in density compared to prior . No pneumothorax is seen . Endotracheal tube , right internal jugular catheter , and esophageal catheter are similarly positioned with esophageal catheter tip out of view .
    OUTPUT:
    
Persistent slightly improved right lower lung opacity .