Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate interval decrease in lung volumes with asymmetric opacity at the left base , seen also on the lateral view , concerning for pneumonia . The cardiac and mediastinal contours are normal . No pleural abnormality is detected .
    OUTPUT:
    
Left lower lobe pneumonia . These findings were relayed to Dr . ___ , by Dr . ___ , at the time of discovery , at 401 pm , on ___ .