Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate well - expanded lungs . There is an increasing opacity in the left mid zone that is concerning for a pneumonia . There is no pleural effusion or pneumothorax . Cardiac size is normal . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Left mid zone opacity consistent with pneumonia . These findings were communicated to Dr . ___ at 11 :41 a .m . by phone .