Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates retrocardiac opacity consistent with a left lower lobe pneumonia . The right lung is grossly clear . There is no pleural effusion or pneumothorax . Cardiac silhouette is within normal limits .
    OUTPUT:
    
Left lower lobe pneumonia . These findings were communicated to the ordering physician , ___ . ___ , by Dr . ___ , ___ telephone at 16 :45 on ___ immediately upon review of the radiograph .