Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ chest radiograph , cardiomediastinal contours are stable with tortuosity of the thoracic aorta . Persistent moderate elevation of left hemidiaphragm with adjacent linearly oriented opacity suggestive of atelectasis , decreased in extent compared to ___ .
    OUTPUT:
    
Chronic elevation of left hemidiaphragm with adjacent left basilar opacity favoring atelectasis over infectious pneumonia .