Rib notching coarctation of the aorta

This chest radiograph of an adult patient with coarctation of the aorta shows rib notching. Image A shows rib notching in the posterior and inferior aspects of the right sided ribs starting at the third rib and is most pronounced in ribs 7 and 8 (arrow). Image B is a magnified view of the notching of ribs 7 and 8.