Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . A trace left - sided pleural effusion may have decreased slightly . A patchy opacity in the left lower lobe appears similar . A vague opacity in the lingula is similar to perhaps minimally improved .
    OUTPUT:
    
No evidence for progression of multifocal pneumonia .