Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The confluent airspace opacities in the left lower lobe are concerning for pneumonia . Left upper and the right lungs are clear . There is no pleural effusion . Heart size , mediastinal and hilar contours are normal .
    OUTPUT:
    
Left lower lobe pneumonia . Dr .___ paged Dr . ___ on ___ at 4 :36 p .m . to discuss the findings , but was unable to reach .