Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Right - sided aortic arch is again noted . Mediastinal and hilar contours are otherwise unremarkable . Lungs are clear periportal vasculature is normal . No pleural effusion or pneumothorax is detected . Rounded sclerotic focus projecting over a mid thoracic vertebral body appears unchanged from ___ , likely a bone island . No acute osseous abnormalities seen .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Right - sided aortic arch .