Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Vagal nerve stimulator device noted overlying the left hemithorax . There is retrocardiac / left lower lobe hazy opacity which may represent pneumonia or atelectasis . Minimal patchy opacity also seen at the right lung base , but the assessment is limited due to relative ___ / technique .
    OUTPUT:
    
Possible bilateral lower lobe atelectasis / pneumonia . Followup recommended .