title: Optically guided linac radiosurgery with a Leksell head frame as an adjunct to Gamma Knife treatment.
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.
authors: Department of Radiation Oncology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. kekstran@wfubmc.edu
authors: Kenneth E
authors: KE
authors: Ekstrand
authors: William H
authors: WH
authors: Hinson
authors: William
authors: W
authors: Kearns
authors: J Daniel
authors: JD
authors: Bourland
authors: Allan F
authors: AF
authors: deGuzman
authors: Kevin P
authors: KP
authors: McMullen
authors: Volker W
authors: VW
authors: Stieber
mesh_terms: D006801:Humans; D008279:Magnetic Resonance Imaging; D016634:Radiosurgery / Q000295:instrumentation* / Q000379:methods*; D015898:Tomography Scanners, X-Ray Computed