radiographic view
-Boden's view: foot neutral, leg IR 30-40 deg, views angled 10,20,30, 40 deg cephalad, allows for view of post facet, largely replaced by CT
-Bohler's angle: first line from ant calcaneous, to highest post articular surface and second line from posterior articular surface to post tubercle, normal is 25-40 deg, decreased angle suggests post facet collapse
-angle of gissane: formed by two cortical struts, one along post facet, the other the ant process of calc, normal is 140 deg, inc angle suggest post facet collapse