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CyberKnife stereotactic radiosurgery
uses computer technology that allows doctors to deliver extraordinarily precise doses of radiation to treat many types of tumors and lesion
s without the uncomfortable screws or frames that were previously used to immobilize patients during treatment. At the core of the CyberKnife system is interactive robotics technology that continuously and automatically tracks a patient’s position, including his or her respiratory motion, while simultaneously tracking the lesion’s position. It uses this information to guide and position each treatment beam to target the lesion precisely. The extreme accuracy
it provides means tissue and organ surrounding the tumor or lesion remains undamaged. CyberKnife was invented at Stanford University and is designed by Accuray Inc.
How does it work?
CyberKnife takes a radically different approach from other stereotactic radiosurgery methods by using a miniature linear accelerator (LINAC)
mounted on a robotic arm
to deliver its therapeutic radiation. A real-time targeting system eliminates the need for head frames
cameras locate the patient’s position and guide the robotic arm
to deliver precisely targeted, small beams of radiation that converge at the tumor from multiple angles. The cumulative dose is high enough to destroy the cancer cells, while radiation exposure to surrounding healthy tissue is minimized. The level of accuracy
achievable by this system allows higher doses of radiation to be used, resulting in greater tumor-killing effectiveness and a higher likelihood of radiosurgical success.
Prior to a CyberKnife treatment, CT
images are taken to define the spatial relationship between the patient’s bone anatomy and the tumor. During the actual treatment, patient movement is monitored in real time by the system’s low-dose X-ray cameras. The CyberKnife’s computer-controlled robotic arm
compensates for any changes in tumor position during treatment. Its accuracy
rate is under a millimeter.
View animation describing CyberKnife
View our television commercial about CyberKnife