Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates at the cavoatrial junction , as before . The heart is normal in size . The mediastinal and hilar contours appear unchanged . Irregular pulmonary architecture again suggests emphysema . Patchy opacities in the right mid to lower lung appear unchanged and are streaky in character , most suggestive of chronic atelectasis or scarring without significant change . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Findings suggesting emphysema without definite evidence for acute disease .