Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low . The heart size is top normal with a left ventricular predominance . The mediastinal and hilar contours are within normal limits . Left lower lobe opacity is concerning for pneumonia . Minimal patchy opacity in the right lung base could reflect atelectasis . No definite pleural effusion or pneumothorax is seen . Minimal patchy opacity is also seen within the left upper lung field . There are no acute osseous abnormalities .
    OUTPUT:
    
Left lower lobe pneumonia . Additional patchy opacity within the left upper lung field could reflect a ___ area of infection . Probable right basilar atelectasis . Follow up radiographs are recommended to ensure resolution this finding after treatment .