Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is normal . There is continued patchy opacification within the left lower lobe . No new areas of focal consolidation are seen , and the right lung remains clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Left lower lobe patchy opacity remains concerning for pneumonia , not significantly changed in the interval . Followup radiographs 4 weeks after treatment are recommended to ensure resolution of this finding .