Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , exaggerating heart size , probably normal and unchanged since ___ . Peribronchial opacities in the left mid and lower lung , overlying the spine on lateral view could be pneumonia . There is no pleural effusion . Enlargement of the right hilus is probably vascular engorgement .
    OUTPUT:
    
Possible left lower lobe pneumonia .