Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube terminates about 5 cm above the carina . An orogastric tube courses into the stomach where it terminates . Surgical clips project over the epigastric region . The cardiac , mediastinal and hilar contours appear stable . There is an opacity in the left mid lung , which may be in the lingula or posterior left lower lobe , but which has decreased .
    OUTPUT:
    
Improvement in left mid lung opacity .