Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views are provided . Patchy left lower lobe opacity may represent pneumonia . There is no effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen . Aortic arch calcifications are mild .
    OUTPUT:
    
In the appropriate clinical setting , patchy left lower lobe opacity may represent early pneumonia .