it aims to 'pack' the different sized spherical high-dose volumes (called 'shots') into a tumor volume. Current gamma knife radiosurgery is planned in a 'ball-packing' approach and delivered in a 'step-and-shoot' manner, i.e. Luan Shuang Swanson, Nathan Chen Zhe, E-mail: E-mail: E-mail: E-mail: knife has been the treatment of choice for various brain tumors and functional disorders. (4) With dynamic gamma knife radiosurgery, one can obtain a family of plans representing a tradeoff between the delivery time andĮnergy Technology Data Exchange (ETDEWEB) (3) It is possible to prescribe multiple isodose lines with dynamic gamma knife radiosurgery, so that the treatment can cover the periphery of the target volume while escalating the dose for high tumor burden regions.
(2) Dynamic radiosurgery plans are more conformal than step-and-shoot plans and can maintain a steep dose gradient (around 13% per mm) between the target tumor volume and the surrounding critical structures. (1) Dynamic gamma knife radiosurgery is ideally suited for fully automatic inverse planning, where high quality radiosurgery plans can be obtained in minutes of computation. We have also carried out experimental studies of dynamic gamma knife radiosurgery and showed the following. We have implemented a fully automatic dynamic gamma knife radiosurgery treatment planning system, where the inverse planning problem is solved as a traveling salesman problem combined with constrained least-square optimizations.
Under our dose-painting concept, gamma knife radiosurgery becomes dynamic, where the patient moves continuously under the robotic positioning system. In our scheme, the spherical high dose volume created by the gamma knife unit will be viewed as a 3D spherical 'paintbrush', and treatment planning reduces to finding the best route of this 'paintbrush' to 'paint' a 3D tumor volume. We have developed a dynamic scheme for gamma knife radiosurgery based on the concept of 'dose-painting' to take advantage of the new robotic patient positioning system on the latest Gamma Knife C(TM) and Perfexion(TM) units. Gamma knife has been the treatment of choice for various brain tumors and functional disorders. Luan Shuang Swanson, Nathan Chen Zhe Ma Lijun International Nuclear Information System (INIS) If you're scheduled for radiation therapy using Gamma Knife®, a treatment team consisting of a radiation. News Physician Resources Professions Site Index A-Z Gamma Knife Gamma Knife® is a radiation therapy that uses computerized.
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