Optically guided linac radiosurgery with a Leksell head frame as an adjunct to Gamma Knife treatment |
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Authors: | Ekstrand Kenneth E Hinson William H Kearns William Bourland J Daniel deGuzman Allan F McMullen Kevin P Stieber Volker W |
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Institution: | Department of Radiation Oncology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. kekstran@wfubmc.edu |
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Abstract: | Because of geometrical limitations in the helmet of the Leksell Gamma Knife(Elekta Corp., Atlanta, GA, USA) certain regions within the cranium cannot be targeted for treatment. We describe a method by which lesions in these regions can be treated with the Varian-Zmed stereotactic radiosurgery system utilizing an infrared optical positioning system attached to a Leksell head frame. We have measured the accuracy of the optical tracking system using a phantom attached to a Leksell frame and have determined that the system can target a linear accelerator radiosurgery beam to an accuracy of within 1 millimeter. |
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