Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . On the lateral view , a small pleural effusion is seen . Opacity projecting over the lower posterior lung on the lateral view may relate to pleural effusion , however , additional consolidation or atelectasis . not excluded . The cardiomediastinal contours are stable .
    OUTPUT:
    
Lower lobe opacity in the lateral view posteriorly most likely small pleural effusion . Additional small consolidation not excluded .