CyberKnife M6

CyberKnife M6 is a robotic system for stereotactic radiosurgery and stereotactic body radiotherapy (SBRT). Despite the name, there is no knife and no cutting. A small linear accelerator sits on a computer-guided robotic arm and delivers many thin beams of focused radiation from hundreds of angles. The beams converge on the tumour with sub-millimetre accuracy, so a high dose reaches the target while nearby healthy tissue is spared. Imaging during treatment tracks the tumour continuously, and a motion-synchronisation feature follows targets that move with breathing, such as those in the lung or liver. Treatment is non-invasive and painless, needs no rigid head frame, and is usually given as an outpatient over one to five sessions. The decision is always made individually by the radiation oncology team.