![CyberKnife® Treatment Hero](/SaintPeters/media/SaintPeters/Services/Heroes/Cyberknife.jpg?ext=.jpg)
Depending on the treatment plan, small metal or gold markers (called fiducials) may be implanted to accurately target radiation from the CyberKnife® Robotic Stereotactic Radiosurgery System. These markers are only three to four millimeters long and are implanted on an outpatient basis. Other patients may be fitted with a Synchrony tracking vest, which, like the markers, tracks tumor movement during treatment.
![](/SaintPeters/media/SaintPeters/Services/CyberKnife_Insert_6.jpg)
![](/SaintPeters/media/SaintPeters/Services/CyberKnife_Insert_5.jpg)