Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Slightly increased lower lobe airspace opacification is compatible with evolving pneumonia . There are no new consolidations . Diffuse parenchymal changes compatible with emphysema are unchanged . A small left pleural effusion is slightly increased . There is no pneumothorax . The heart and mediastinum can not be accurately assessed on this projection .
    OUTPUT:
    
Evolving left lower lobe pneumonia with increased small left pleural effusion .