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 . Minimal patchy opacities are seen within the left lower lobe which could reflect a subtle or early pneumonia . Right lung is clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Subtle patchy opacity within the left lower lobe could reflect an early or developing pneumonia in the correct clinical setting .