Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Left lower lobe pneumonia is less dense , improving over time . No pleural effusion or pneumothorax . Severe bilateral apical thickening and likely calcified granulomas are unchanged from prior . Chronic changes in the right base are again seen .
    OUTPUT:
    
Left lower lobe pneumonia is less dense , improving over time .