Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a small left pleural effusion with unchanged appearance of the left lower lobe scar - like opacity , more fully characterized on CT of ___ . Severe right basal emphysema and right upper lobe linear scarring are also unchanged . No pneumothorax is seen . The heart size is normal . The mediastinal and hilar contours are unchanged .
    OUTPUT:
    
No significant interval change of small left pleural effusion and left basal scar - like opacity . CT would be more sensitive in detecting subtle changes .