Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is normal . New , ill - defined patchy opacities within the left upper lobe and lingula are concerning for pneumonia . The right lung is clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Left upper lobe and lingular opacities are concerning for pneumonia . Followup radiographs after treatment are recommended to ensure resolution of this finding .