Study of the Influence of Uniform Transverse Magnetic Field on the Dose Distribution of High Energy Electron Beam Using Monte Carlo Method_Journal of Biomedical Engineering

Authors：

YOUShihu , XUYun , WUZhangwen , HOUQing ,  GOUChengjun

Key Laboratory of Radiation Physics and Technology(Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China;

Corresponding author：

GOUChengjun, Email: ChengJ.Gou@263.net

Keywords：

magnetic field; electron beam; dose distribution; Monte Carlo

DOI：

10.7507/1001-5515.20140256

Video：

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In the present work, Monte Carlo simulations were employed to study the characteristics of the dose distribution of high energy electron beam in the presence of uniform transverse magnetic field. The simulations carried out the transport processes of the 30 MeV electron beam in the homogeneous water phantom with different magnetic field. It was found that the dose distribution of the 30 MeV electron beam had changed significantly because of the magnetic field. The result showed that the range of the electron beam was decreased obviously and it formed a very high dose peak at the end of the range, and the ratio of maximum dose to the dose of the surface was greatly increased. The results of this study demonstrated that we could change the depth dose distribution of electron beam which is analogous to the heavy ion by modulating the energy of the electron and magnetic field. It means that using magnetic fields in conjunction with electron radiation therapy has great application prospect, but it also has brought new challenges for the research of dose algorithm.

Citation： YOUShihu, XUYun, WUZhangwen, HOUQing, GOUChengjun. Study of the Influence of Uniform Transverse Magnetic Field on the Dose Distribution of High Energy Electron Beam Using Monte Carlo Method. Journal of Biomedical Engineering, 2014, 31(6): 1350-1354. doi: 10.7507/1001-5515.20140256 Copy

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1. BOSTICK W H. Possible techniques in direct-electron beam tumour therapy[J]. Phys Rev, 1950, 77(4):564-565.
2. WEINHOUS M S, NATH R, SCHULZ R J. Enhancement of electron beam dose distributions by longitudinal magnetic fields:Monte Carlo simulations and magnet system optimization[J]. Med Phys, 1985, 12(5):598-603.
3. BIELAJEW A F. The effect of strong longitudinal magnetic fields on dose deposition from electron and photon beams[J]. Med Phys, 1993, 20(4):1171-1179.
4. CHEN Y, BIELAJEW A F, LITZENBERG D W, et al. Magnetic confinement of electron and photon radiotherapy dose:a Monte Carlo simulation with a nonuniform longitudinal magnetic field[J]. Med Phys, 2005, 32(12):3810-3818.
5. SHIH C C. High energy electron radiotherapy in a magnetic field[J]. Med Phys, 1975, 2(1):9-13.
6. NARDI E, BARNEA G. Electron beam therapy with transverse magnetic fields[J]. Med Phys, 1999, 26(6):967-973.
7. LEE M C, MA C M. Monte Carlo characterization of clinical electron beams in transverse magnetic fields[J]. Phys Med Biol, 2000, 45(10):2947-2967.
8. WHITMIRE D P, BERNARD D L, PETERSON M D, et al. Magnetic enhancement of electron dose distribution in a phantom[J]. Med Phys, 1977, 4(2):127-131.
9. NATH R, SCHULZ R J. Modification of electron-beam dose distributions by transverse magnetic fields[J]. Med Phys, 1978, 5(3):226-230.
10. PALIWAL B R, WILEY A L, J R, WESSELS B W, et al. Magnetic field modification of electron-beam dose distributions in inhomogeneous media[J]. Med Phys, 1978, 5(5):404-408.
11. AGOSTINELLI S, ALLISON J, AMAKO K, et al. Geant4-a simulation toolkit[J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2003, 506(3):250-303.
12. ICRU. Radiation dosimetry:electron beams with energies between 1 and 50 MeV. International Commission on Radiation Units and Measurements,Bethesda[R]. ICRU Report, 1984:35.

Journal of Biomedical Engineering

Study of the Influence of Uniform Transverse Magnetic Field on the Dose Distribution of High Energy Electron Beam Using Monte Carlo Method

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