This document discusses, among other things, fiducial marker devices, tools, and methods. One example illustrates a combined imagable fiducial locator and divot for receiving a positioning wand of an image-guided surgical (IGS) workstation. A further example is reflective such that it is locatable by...http://www.google.com.au/patents/US8073530?utm_source=gb-gplus-sharePatent US8073530 - Fiducial marker devices, tools, and methods
