Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube terminates 3 cm above the carina . Left subclavian catheter is unchanged in satisfactory position . Left lower lobe opacity is again equivocal for pneumonia or large effusion . Vascular congestion is unchanged .
    OUTPUT:
    
Unchanged left lower lobe opacity . Evaluation with a lateral view is recommended to aid in differentiation between pneumonia and effusion . When lateral is obtained please attempt to have patient as upright as possible with arms extended .