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Title: Development of an ultrasmall C-band linear accelerator guide for a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head

Abstract

We are developing a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head. It is capable of pursuing irradiation and delivering irradiation precisely with the help of an agile moving x-ray head on the gimbals. Requirements for the accelerator guide were established, system design was developed, and detailed design was conducted. An accelerator guide was manufactured and basic beam performance and leakage radiation from the accelerator guide were evaluated at a low pulse repetition rate. The accelerator guide including the electron gun is 38 cm long and weighs about 10 kg. The length of the accelerating structure is 24.4 cm. The accelerating structure is a standing wave type and is composed of the axial-coupled injector section and the side-coupled acceleration cavity section. The injector section is composed of one prebuncher cavity, one buncher cavity, one side-coupled half cavity, and two axial coupling cavities. The acceleration cavity section is composed of eight side-coupled nose reentrant cavities and eight coupling cavities. The electron gun is a diode-type gun with a cerium hexaboride (CeB{sub 6}) direct heating cathode. The accelerator guide can be operated without any magnetic focusing device. Output beam current was 75 mA with a transmission efficiency of 58%, and themore » average energy was 5.24 MeV. Beam energy was distributed from 4.95 to 5.6 MeV. The beam profile, measured 88 mm from the beam output hole on the axis of the accelerator guide, was 0.7 mmx0.9 mm full width at half maximum (FWHM) width. The beam loading line was 5.925 (MeV)-I{sub b} (mA)x0.00808 (MeV/mA), where I{sub b} is output beam current. The maximum radiation leakage of the accelerator guide at 100 cm from the axis of the accelerator guide was calculated as 0.33 cGy/min at the rated x-ray output of 500 cGy/min from the measured value. This leakage requires no radiation shielding for the accelerator guide itself per IEC 60601-2-1.« less

Authors:
; ; ; ; ; ;  [1];  [2];  [2];  [2];  [2];  [2]
  1. Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 10, Oye-cho-Minato-ku, Nagoya, Aichi 455-8515 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
20951310
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Physics; Journal Volume: 34; Journal Issue: 5; Other Information: DOI: 10.1118/1.2723878; (c) 2007 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BEAM CURRENTS; ELECTRON GUNS; IMAGES; LINEAR ACCELERATORS; RADIOTHERAPY; X RADIATION

Citation Formats

Kamino, Yuichiro, Miura, Sadao, Kokubo, Masaki, Yamashita, Ichiro, Hirai, Etsuro, Hiraoka, Masahiro, Ishikawa, Junzo, Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215, Advanced Therapeutic Development Department, Institute of Biomedical Research and Innovation, 2-2 Minatojima Minamimachi Chuo-ku, Kobe Hyogo 650-0047, Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215, Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, and Department of Electronic Science and Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510. Development of an ultrasmall C-band linear accelerator guide for a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head. United States: N. p., 2007. Web. doi:10.1118/1.2723878.
Kamino, Yuichiro, Miura, Sadao, Kokubo, Masaki, Yamashita, Ichiro, Hirai, Etsuro, Hiraoka, Masahiro, Ishikawa, Junzo, Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215, Advanced Therapeutic Development Department, Institute of Biomedical Research and Innovation, 2-2 Minatojima Minamimachi Chuo-ku, Kobe Hyogo 650-0047, Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215, Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, & Department of Electronic Science and Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510. Development of an ultrasmall C-band linear accelerator guide for a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head. United States. doi:10.1118/1.2723878.
Kamino, Yuichiro, Miura, Sadao, Kokubo, Masaki, Yamashita, Ichiro, Hirai, Etsuro, Hiraoka, Masahiro, Ishikawa, Junzo, Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215, Advanced Therapeutic Development Department, Institute of Biomedical Research and Innovation, 2-2 Minatojima Minamimachi Chuo-ku, Kobe Hyogo 650-0047, Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215, Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, and Department of Electronic Science and Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510. Tue . "Development of an ultrasmall C-band linear accelerator guide for a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head". United States. doi:10.1118/1.2723878.
@article{osti_20951310,
title = {Development of an ultrasmall C-band linear accelerator guide for a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head},
author = {Kamino, Yuichiro and Miura, Sadao and Kokubo, Masaki and Yamashita, Ichiro and Hirai, Etsuro and Hiraoka, Masahiro and Ishikawa, Junzo and Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215 and Advanced Therapeutic Development Department, Institute of Biomedical Research and Innovation, 2-2 Minatojima Minamimachi Chuo-ku, Kobe Hyogo 650-0047 and Medical Systems Administration Office, Mitsubishi Heavy Industries, Ltd., 2-16-5, Konan Minato-ku, Tokyo 108-8215 and Department of Radiation Oncology and Image-applied Therapy, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507 and Department of Electronic Science and Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510},
abstractNote = {We are developing a four-dimensional image-guided radiotherapy system with a gimbaled x-ray head. It is capable of pursuing irradiation and delivering irradiation precisely with the help of an agile moving x-ray head on the gimbals. Requirements for the accelerator guide were established, system design was developed, and detailed design was conducted. An accelerator guide was manufactured and basic beam performance and leakage radiation from the accelerator guide were evaluated at a low pulse repetition rate. The accelerator guide including the electron gun is 38 cm long and weighs about 10 kg. The length of the accelerating structure is 24.4 cm. The accelerating structure is a standing wave type and is composed of the axial-coupled injector section and the side-coupled acceleration cavity section. The injector section is composed of one prebuncher cavity, one buncher cavity, one side-coupled half cavity, and two axial coupling cavities. The acceleration cavity section is composed of eight side-coupled nose reentrant cavities and eight coupling cavities. The electron gun is a diode-type gun with a cerium hexaboride (CeB{sub 6}) direct heating cathode. The accelerator guide can be operated without any magnetic focusing device. Output beam current was 75 mA with a transmission efficiency of 58%, and the average energy was 5.24 MeV. Beam energy was distributed from 4.95 to 5.6 MeV. The beam profile, measured 88 mm from the beam output hole on the axis of the accelerator guide, was 0.7 mmx0.9 mm full width at half maximum (FWHM) width. The beam loading line was 5.925 (MeV)-I{sub b} (mA)x0.00808 (MeV/mA), where I{sub b} is output beam current. The maximum radiation leakage of the accelerator guide at 100 cm from the axis of the accelerator guide was calculated as 0.33 cGy/min at the rated x-ray output of 500 cGy/min from the measured value. This leakage requires no radiation shielding for the accelerator guide itself per IEC 60601-2-1.},
doi = {10.1118/1.2723878},
journal = {Medical Physics},
number = 5,
volume = 34,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}