Patent ID: 7993353

Claim:
A medical tracking system comprising at least one tracking marker holder and at least one fastener base, the tracking marker holder being interchangeably mountable to different fastener bases, and the fastener base being interchangeably mountable to different tracking marker holders, wherein the tracking marker holder includes a marker holder body having a fastener hub at which the marker holder can be attached to the fastener base, and a plurality of mounts for mounting respective tracking markers in a fixed positional relationship to the fastener hub, which tracking markers are trackable by medical tracking equipment, the fastener hub including a hole that opens to a mounting face of the fastener hub; and a fastening device associated with the hole and having a coupling portion for coupling with a mating coupling of the fastener base, whereby the marker holder can be secured to the fastener base, and wherein the mounting face is provided with at least one anti-rotate element for mating with a corresponding anti-rotate element on a mounting seat of the fastener base to prevent rotation of the marker holder relative to the fastener base when the mounting face of the fastener hub is held in juxtaposition with the mounting seat of the fastener base by the fastening device.