The stent described herein is configured with expandable rings at either
end of the stent having increased radial strength compared to the
expandable middle rings. This difference between the configuration of the
stent at the middle and ends of the stent results in more even expansion
properties of the stent, better crimping properties of the stent, and
uniform diameter post deployment. The expandable rings are formed by a
plurality of struts and a plurality of ductile hinges arranged such that
upon expansion, the ductile hinges are deformed while the struts are not
deformed.