Fiducials are markings found on either the head frame or bite block. Additionally, they may be surgically implanted to treat spine or other tumors. The fiducials act as markers, helping to identify precisely the location of the tumor.

Fiducials are markings found on either the head frame or bite block. Additionally, x-ray visible fiducials may be surgically implanted for treatment of spinal or other tumors. The fiducials act as markers to precisely identify the location of a tumor or other target.