Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small amount of left basilar linear atelectasis is stable from the prior radiograph . There is no evidence of pneumonia or edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal . Calcification of the aortic arch is noted .
    OUTPUT:
    
Stable mild left basilar atelectasis .