Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the chest radiograph obtained ___ , the lungs are better aerated . There is a band of atelectasis within the lower left lung . Lungs are otherwise fully expanded and clear without consolidations or effusions . Heart size is normal . Cardiomediastinal and hilar silhouettes are normal . Pleural surfaces are normal . Incidental note is made of an accessory azygos lobe .
    OUTPUT:
    
No radiographic evidence of pneumonia or other significant cardiopulmonary abnormalities . Incidental note is made of an accessory azygos lobe .