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Linac Based Radiosurgery:A technical report Hisataka HAYASHI 1 , Akihiko ASAGA 1 , Motoi SAKUDOH 1 , Susumu HOSHINO 1 , Syoichi KATSUTA 1 , Yasuyuki AKINE 2 1Department of Radiation Therapy, National Cancer Center Hospital 2Outpatient Clinic, National Cancer Center Hospital Keyword: Radiosurgery , Linear accelerator , Brain tumor , Dose localization pp.769-773
Published Date 1992/7/10
DOI https://doi.org/10.11477/mf.1436900491
  • Abstract
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A method for highly dose-localized irradiation using a linear accelerator (linac) for a brain tumor has been developed. The method requires a linac, a computed tomography (CT) system, a CT simulator, and a treat-ment planning system for radiotherapy, with which most major radiotherapy centers are equipped. To im-mobilize a patient during irradiation, a custom-made de-vice made of synthetic material which became flexible with heating was used. With the CT system and the CT simulator the target was identified and geometrical data for positioning the tumor at a point to which x-ray beams were directed (an isocenter of the linac) were obtained. By rotating a treatment couch it was made possible for the x-ray source to rotate around the isocenter on multiple planes. Dose distributnm obtained with this method was compared to that of the gamma unit and found comparable. Since the method requires no invasive procedure, it appears suitable for treatment, with fractionated irradiation, of malignant tumors.


Copyright © 1992, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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