Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size , mediastinal , and hilar contours are normal . The lungs demonstrate mild bibasilar atelectatic changes , although are without focal consolidation , pleural effusion , or pneumothorax . Degenerative changes of the thoracic spine are seen .
    OUTPUT:
    
Mild bibasilar atelectatic changes without focal consolidation , pleural effusion , or pneumothorax .