Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal pneumonia , edema , effusion , or pneumothorax . The heart is normal in size . No acute osseous abnormality . Prominence of the right mediastinal contour corresponds to an ectatic ascending thoracic aorta on the prior CT in ___ .
    OUTPUT:
    
No focal pneumonia or pneumothorax .