Radiosurgery Systems for Non-Invasive Treatment of Lung Tumors

The Xsight lung tracking system, Xchange robotic collimator changer, and the four-dimensional (4D) treatment optimization and planning system, all developed by Accuray, Inc. (Sunnyvale, CA, USA), when combined with the Accuray CyberKnife robotic radiosurgery system, provide a non-invasive, fiducial-free lung cancer treatment alternative that eliminates the risk of complications common with the implantation of markers or fiducials. Furthermore, the technology can decrease treatment times through treatment planning optimization and reduced treatment delivery interruptions.

The Xsight lung tracking system uses sophisticated image processing and registration techniques to directly lock onto and track the tumor throughout the treatment. It works with Accuray's synchrony respiratory tracking system to track, detect, and correct for tumor and patient movement, allowing patients to breathe normally without the need for gating or breath-holding techniques. Xsight Lung's radiosurgery accuracy may eliminate the need for the invasive placement or tracking of radiographic markers or fiducials reducing the risk inherent to traditional treatment methods.

The Xsight lung tracking system is designed to provide a non-invasive, more comfortable alternative for patients while maintaining the precision and accuracy required for radiosurgery treatments. Research has confirmed that there is a risk of pneumothorax when fiducials are used to mark lung tumors. By using non-invasive means to precisely target lung tumors, oncologists will be able to more rapidly and effectively treat patients, including ones who are now considered to be medically inoperable.

The CyberKnife System is the world's first and only radiosurgery system that utilizes intelligent robotics to treat tumors anywhere in the body with sub-millimeter accuracy. The CyberKnife System treats patients in single or staged (typically two to five) sessions by delivering multiple beams of precisely directed radiation that converge upon the tumor while minimizing injury to surrounding healthy tissue. Image guidance and computer-controlled robotics combine to continuously track, detect, and correct for tumor and patient movement throughout the treatment. Because of this precision and accuracy, no head or body frame is required.



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