Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate normal heart size . Low lung volumes . Retrocardiac opacity consistent with left lower lobe pneumonia .
    OUTPUT:
    
Left lower lobe pneumonia . Recommend follow up chest x-ray after treatment to ensure resolution . Telephone notification to Dr ___ by Dr ___ at 8 : 15 on ___ and an email was sent to the ED QA nurses .