Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat low . Indistinct left lower lung opacity could reflect pneumonia or atelectasis . No other focal opacities . Heart size is top - normal . Cardiomediastinal and hilar silhouettes are unremarkable . Multiple surgical clips project over the right upper quadrant . Proximal left humeral diaphysis hardware is again noted .
    OUTPUT:
    
Probable lateral segment left lower lobe pneumonia .