Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . A small area of increased density in the left lower lobe may represent atelectasis , aspiration , or infection . No pleural effusion or pneumothorax is detected . Heart and mediastinal contours are stable .
    OUTPUT:
    
Small left lower lobe consolidation , which may represent atelectasis , aspiration or pneumonia .