Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is top - normal though slightly exaggerated secondary to low lung volumes . The hilar and mediastinal contours are unremarkable . Mild left lower lobe atelectasis is seen . No consolidations , pleural , or pneumothorax are seen .
    OUTPUT:
    
Left lower lobe atelectasis and no evidence of pneumonia .