Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . The lungs are clear and the pulmonary vascularity is normal . No pleural effusion or pneumothorax is detected . Somewhat oblong density measuring ___ millimeters is seen projecting over the right ___ posterior rib as it crosses the right ___ anterior rib , likely a non aggressive osseous lesion such as a bone island , and not felt to be within the lung as is is not seen on the lateral view .
    OUTPUT:
    
No acute cardiopulmonary abnormality .