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Chinese Physics C> 2001, Vol. 25> Issue(3) : 271-276 

A Soft Modulating and Double-Scattering Beam Delivery System for Proton Therapy

  •  Institute of High Energy Physics, CAS, Beijing 100039, China

  • The proton therapy is a new developing method in the radiation oncology. The superior dose localization capabilities of proton beams suggest the possibility of depositing a higher dose into the cancer while reducing the unwanted radiation damage in surrounding normal tissues. The merit can be realized with the aid of the beam delivery system, whose functions are energy adjustment, energy modulation, beam spreading and collimation. In this paper a new soft-modulating and double-scattering beam delivery system is proposed. It uses a program-controlled modulator to change proton energy and thereby the proton range in the body so that the Bragg peak is spread out. Moreover, a larger treatment field can be obtained with two scatterers. The delivery system has high reliability and flexibility, and is especially good for conformal therapy.
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    [1] YU Qing-Chang, LUO Zheng-Ming et al. Foundations of Protontherapy Technology Beijing: Atomic Energy Press,1999: 1(in Chinese)(郁庆长, 罗正明等. 质子治疗技术基础. 北京:原子能出版社, 1999:1)2 Coutrakon G, Bauman M, Lesyna D et al. Med. Phys., 1991, 18:10933 Koehler A M, Schneider R J, Sistermn J M. Nucl. Instr. Meth., 1975, 131:4374 Chu W T, Ludewigt B A, Renner T R. Rev. Sci. Instr., 1993, 64:20555 YU Jian-Guo, YU Qing-Chang. High Energy Phys. and Nucl. Phys., 1997, 21:851(in Chinese)(余建国, 郁庆长. 高能物理与核物理, 1997,21:851)6 Pedruni E, Bacher R, Blattmann H et al. Med. Phys., 1995, 22:377 Wilson R R. Phys. Rev. , 1947, 71:3858 Moliere GZ. Naturfomh, 1948, 3a:789 Gottschalk B, Koehler A M, Sisterson J M et al. In: Inter. Proton Radiotherapy Workshop. Switzerland: PSI, 1991.50

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YU Qing-Chang and XU Tao-Guang. A Soft Modulating and Double-Scattering Beam Delivery System for Proton Therapy[J]. Chinese Physics C, 2001, 25(3): 271-276.
YU Qing-Chang and XU Tao-Guang. A Soft Modulating and Double-Scattering Beam Delivery System for Proton Therapy[J]. Chinese Physics C, 2001, 25(3): 271-276. shu
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Received: 2000-03-10
Revised: 1900-01-01
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A Soft Modulating and Double-Scattering Beam Delivery System for Proton Therapy

    Corresponding author: YU Qing-Chang,
  • Institute of High Energy Physics, CAS, Beijing 100039, China
  • Received Date: 2000-03-10
  • Accepted Date: 1900-01-01
  • Available Online: 2001-03-05

Abstract: The proton therapy is a new developing method in the radiation oncology. The superior dose localization capabilities of proton beams suggest the possibility of depositing a higher dose into the cancer while reducing the unwanted radiation damage in surrounding normal tissues. The merit can be realized with the aid of the beam delivery system, whose functions are energy adjustment, energy modulation, beam spreading and collimation. In this paper a new soft-modulating and double-scattering beam delivery system is proposed. It uses a program-controlled modulator to change proton energy and thereby the proton range in the body so that the Bragg peak is spread out. Moreover, a larger treatment field can be obtained with two scatterers. The delivery system has high reliability and flexibility, and is especially good for conformal therapy.

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