a fiducial marker system using digital techniques

The apparatus of claim 4, wherein the marker areas on the distal portion of the bar comprise receivers for receiving fiducial markers.Ħ. Skull fiducial marker apparatus, comprising a bar having a proximal portion and a connector on the proximal portion for connecting to a removable maxillary teeth-connected mouthpiece, the bar having a distal portion and the distal portion having marker areas, wherein the bar is U-shaped, wherein the proximal portion is a medial portion of the U-shaped bar, and wherein the U-shaped bar has two spaced distal portions with fiducial marker areas, wherein the bar is relatively thick at the proximal portion and relatively thin at the distal portions.ĥ. A skull fiducial marker apparatus, comprising a custom mouthpiece for attachment to the maxilla of a patient, a projection extending forward from the mouthpiece, a curved U-shaped bar having a medial portion connected to a front of the forward projection for holding the bar spaced from a patient's body, fiducial markers attachable to the U-shaped bar, the U-shaped bar having remotely positioned distal portions for receiving the fiducial markers, wherein the distal portions of the bar have fiducial marker attachments comprising threaded openings in distal ends of the bar, and wherein the fiducial markers have threaded studs for securing in the threaded openings.Ĥ.

The apparatus of claim 1, wherein the forward projection extends into a recess in the bar.ģ. A skull fiducial marker apparatus, comprising a custom mouthpiece for attachment to the maxilla of a patient, a projection extending forward from the mouthpiece, a curved U-shaped bar having a medial portion connected to a front of the forward projection for holding the bar spaced from a patient's body, fiducial markers attachable to the U-shaped bar, the U-shaped bar having remotely positioned distal portions for receiving the fiducial markers, wherein the bar is relatively thick at its medial portion, and wherein the bar tapers to relatively thin distal ends.Ģ.

A fiducial marker system using digital techniques