Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart and mediastinal contours are slightly enlarged , but unchanged from prior . The lungs are clear , without focal consolidation to suggest pneumonia . There is bibasilar atelectasis . There is no pneumothorax or pleural effusion . Mild degenerative changes of the thoracic spine , marked by anterior osteophytosis , are present .
    OUTPUT:
    
No acute cardiopulmonary process .