Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral heterogeneous lower lobe opacities are seen . No additional focal opacities . Pleural surfaces are clear without pleural effusion or pneumothorax . Heart size is mildly enlarged and likely related to poor inspiratory effort . Mediastinal contour and hila are normal .
    OUTPUT:
    
Bilateral heterogeneous lower lobe opacities are concerning for pneumonia or aspiration pneumonia .