Comparison with Other Treatments

Radiosurgery allows non-invasive treatment of benign and malignant tumors. It is also known as stereotactic radiotherapy, (SRT) when used to target lesions in the brain, and stereotactic body radiotherapy (SBRT) when used to target lesions in the body. Below are common radiosurgery system used world-wide, however there are differences between systems which impact treatment technique.

  CyberKnife® GammaKnife Other Linac Systems
Yes Yes No
Area treatable with Radiosurgical Precision Entire Body Brain and Skull Varies depending upon specific system

Rigid Brain (Surgical Halo) or Body Frame Required
No Yes Yes
Lesion Size Limitation No Yes No
Capable of preserving adjacent tissues by dividing treatments Yes No Yes
Capable of tracking lesion in real time to follow motion caused by organ movement and breathing with radiosurgical precision Yes N/A No
Intensity Modulated Radiation Therapy (IMRT) Dosimetry Method Yes No Yes
Image-Guided Radiation Therapy (IGRT) Set-up Visualization Yes No Yes
Capable of conformally and homogeneously treating a non-spherical target volume > 3.5cm Yes No Yes
Capable of fractionated (multi-session) radiosurgery to better preserve critical adjacent tissue Yes No Yes
Continuously adapts to lesion motion caused by breathing (real time respiratory tracking) Yes N/A Respiratory gating but does not track with radiosurgical precision
Capable of real-time sub-millimeter translational and rotational beam adaptation to target volume motion Yes N/A No