Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates at the cavoatrial junction . The cardiac , mediastinal and hilar contours appear unchanged . There are streaky left mid and lower lung opacities , suggesting minor atelectasis or scarring which are unchanged . Otherwise , the lungs appear clear . There is no pneumothorax .
    OUTPUT:
    
No evidence of pneumothorax .