A Method to Increase the Dose Rate of Medical Linear Electron Accelerators by Considering the Target and the Flattening Filter as a Whole System When Designing the Target

KONG Xiao-Xiao; ZHAO Hong-Bin; LI Quan-Feng; LIN Xiao-Qi

Chinese Physics C> 2005, Vol. 29> Issue(9) : 903-906

A Method to Increase the Dose Rate of Medical Linear Electron Accelerators by Considering the Target and the Flattening Filter as a Whole System When Designing the Target

Department of Engineering Physics, Tsinghua University, Beijing 100084, China2 Peking University, Beijing 100871, China3 Beijing Medical Equipment Institute, Beijing 100011, China

Abstract
HTML
Reference
Related

PDF

Abstract：
Generally, the design of the target used in the medical electron accelerator follows the thick-target rule, that is, using a target thicker than the electron range to make almost no electrons penetrating out of the target. In this article, a new rule of target design is proposed. The target and the relevant components (primary collimator and flattening filter) are considered as a whole system when designing the target, that is, using a thinner target to increase the dose rate and using the primary collimator and the flattening filter to reduce the contaminated electrons. To improve the dose rate in the treatment, an optimization is given to the target design of BJ-6, a 6MV medical linear electron accelerator, by using Monte Carlo method. By using MC codes of MCNP and BEAMnrc, simulations are given to calculate the percent depth dose profiles in the 10cm×10cm field and the 30cm×30cm field respectively. The surface dose satisfies the national standards and the dose rate in treatment increases 10 percent of that of the present thick-target. The feasibility of this method has been tested by experiment.

References

[1]

. Teterev U G, Belov A G. Induced Activity of a Tungsten Target in a 10MeV Electron Accelerator. Atomic Energy,2001, 91(3): 745-7482. Karzmark C J et al. Medical Electron Accelerators. McGraw-Hill, 19933. MCNP4C, CCC-700. New Mexico: Los Alamos National Laboratory, 19974. Rogers D W O, Faddegon B A, DING G X et al. BEAM:A Monte Carlo Code to Simulate Radiotherapy Treatment Units. Med. Phys., 1995, 22: 503-5245. Walters B R B, Rogers DWO. DOSXYZnrc Users Manual:NRCC Report PIRS-794. 20026. GBZ126-2002, Radiological Protection Standard for Using of Medical Electron Accelerator(in Chinses)(GBZ126-2002,医用电子加速器卫生防护标准)

[1]	ZHANG Meng , PENG Shi-Xiang , SONG Zhi-Zhong , ZHAO Jie , XU Rong , YUAN Zhong-Xi , GUO Zhi-Yu , LU Yuan-Rong , YU Jin-Xiang . Experimental Results of an ECR Oxygen Source and a LEBT System for 1MeV ISR RFQ Accelerator Upgrade Project. Chinese Physics C, 2008, 32(S1): 220-222.
[2]	ZHANG Meng , LU Yuan-Rong , PENG Shi-Xiang , ZHU Kun , YAN Xue-Qing , GAO Shu-Li , WANG Zhi , GUO Zhi-Yu , ZHAO Jie , FANG Jia-Xun , LI Wei-Guo , GUO Ju-Fang , YUAN Zhong-Xi , SONG Zhi-Zhong , YU Jin-Xiang , YU Mao-Lin , CHEN Jia-Er . Upgrading of a Heavy Ion 1MeV ISR RFQ Accelerator. Chinese Physics C, 2008, 32(S1): 262-264.
[3]	WEI Su-Min , ZHANG Tian-Jue , XING Jian-Sheng , LI Zhen-Guo , CHU Cheng-Jie , WU Long-Cheng , JIA Xian-Lu , PAN Gao-Feng , GE Tao , XIE Huai-Dong , LÜ Yin-Long , HOU Shi-Gang , GUAN Feng-Ping , AN Shi-Zhong , ZHONG Jun-Qing , YANG Jian-Jun , YAO Hong-Juan . Beam Line Design and Construction of Gas Target for a 30MeV Medical Cyclotron. Chinese Physics C, 2008, 32(S1): 77-79.
[4]	WEN Yong-Wu , WEN Xu , LIU Jian-Xin . Microwave System of Medical Standing Electron Linear Accelerator. Chinese Physics C, 2007, 31(7): 683-685.
[5]	LI Zhi-Hui , ZHANG Jin-Quan , LIU Yong , XIA Jia-Wen , ZHAO Hong-Wei , ZHAN Wen-Long . Development of the Lanzhou Heavy Ion Linac. Chinese Physics C, 2006, 30(S1): 129-131.
[6]	YANG Xue-Qing , FANG Jia-Xun , GUO Zhi-Yu , CHEN Jia-Rong . Matching Design Method for High Intensity RFQ Accelerators. Chinese Physics C, 2006, 30(S1): 19-21.
[7]	LI Shi-Hong , JIANG Shan , HE Ming , GUAN Yong-Jing , DONG Ke-Jun , WU Shao-Yong , YUAN Yuan , MI Sheng-Quan , LIU Shu-Tian , YUAN Jian . Measurements of 41Ca in Biological Samples by AMS Using CaF2 Target. Chinese Physics C, 2005, 29(12): 1210-1213.
[8]	GU Peng-Da , GEN Zhe-Qiao , CUI Yan-Yan , PEI Guo-Xi , WANG Shu-Hong . Design Studies of RF Phasing System for BEPCII Linac. Chinese Physics C, 2005, 29(3): 316-320.
[9]	WANG Fa-Ya . Design of Accelerating Structure on a Novel Compact Electron Linac. Chinese Physics C, 2004, 28(10): 1109-1115.
[10]	WAN Jun-Sheng , ZHANG Ying , ZHANG Li-Xing , YU Hong-Wei , XIA Hai-Hong , DING Da-Zhao . Studies on Optimization of Solid W-Target in Accelerator-Driven System. Chinese Physics C, 2003, 27(6): 537-541.
[11]	SHANG Lei , LUO Xue-Fang , WANG Wei , HONG Jun , LU Ye-Ming , ZHANG Yi , ZHAO Feng . Design and Upgrading of HLS Linac Modulators. Chinese Physics C, 2003, 27(12): 1133-1137.
[12]	FU Shi-Nian , GUAN Xia-Ling , FANG Shou-Xian . Equipartitioning Design Method of a Quasi-Periodic Focusing-Accelerating Coupled System. Chinese Physics C, 2002, 26(1): 79-86.
[13]	YUAN Chang-Zheng , ZHANG Bing-Yun , QIN Qing . τ-Charm Factory Physics and Restriction to the Accelerator and Detector Design. Chinese Physics C, 2002, 26(12): 1201-1208.
[14]	YU Qing-Chang . Study on Design of Proton Linacs. Chinese Physics C, 2001, 25(5): 429-436.
[15]	GUO WeiMing , YU QingChang . Design Study of a Injector of Proton Accelerator 714MHz RFQ. Chinese Physics C, 2000, 24(3): 262-268.
[16]	Zhou Linong , Zhang Mutian , Luo Zihua , Yu Qingchang , Kong Dengming , Qiao Jimin . Preliminary Design of a Dedicated Proton Therapy Linac. Chinese Physics C, 1998, 22(11): 1042-1049.
[17]	LEI Chuan-Heng . A NEW KIND OF POCKET GAMMA-NEUTRON DOSERATE CHIRPER. Chinese Physics C, 1987, 11(5): 609-613.
[18]	LI Jian-Ping , WU Jing-Min , LIU Shu-Dong , TANG E-Sheng . MEASUREMENT OF PULSED NEUTRON FLUX AND DOSE EQUIVALENT RATE FOR 30MeV ELECTRON LINAC. Chinese Physics C, 1987, 11(3): 314-320.
[19]	TANG E-Sheng , CHEN Zhi-Bu , LI Jian-Ping , LIU Shu-Dong . MEASUREMENTS OF THE MIXED RADIATION FIELD AROUND A PROTON LINAC. Chinese Physics C, 1986, 10(2): 215-222.
[20]	DU WEN-FU . AN APPLICATION OF THE GOLDEN SECTION METHOD IN THE MAGNET DESIGN FOR ACCELERATOR. Chinese Physics C, 1981, 5(1): 137-140.

Access

Get Citation

KONG Xiao-Xiao, ZHAO Hong-Bin, LI Quan-Feng and LIN Xiao-Qi. A Method to Increase the Dose Rate of Medical Linear Electron Accelerators by Considering the Target and the Flattening Filter as a Whole System When Designing the Target[J]. Chinese Physics C, 2005, 29(9): 903-906.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2004-12-03
Revised: 1900-01-01

Article Metric

Article Views(4224)
PDF Downloads(576)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A Method to Increase the Dose Rate of Medical Linear Electron Accelerators by Considering the Target and the Flattening Filter as a Whole System When Designing the Target

Corresponding author: KONG Xiao-Xiao,

Department of Engineering Physics, Tsinghua University, Beijing 100084, China2 Peking University, Beijing 100871, China3 Beijing Medical Equipment Institute, Beijing 100011, China

Received Date: 2004-12-03

Accepted Date: 1900-01-01

Available Online: 2005-09-05

Abstract: Generally, the design of the target used in the medical electron accelerator follows the thick-target rule, that is, using a target thicker than the electron range to make almost no electrons penetrating out of the target. In this article, a new rule of target design is proposed. The target and the relevant components (primary collimator and flattening filter) are considered as a whole system when designing the target, that is, using a thinner target to increase the dose rate and using the primary collimator and the flattening filter to reduce the contaminated electrons. To improve the dose rate in the treatment, an optimization is given to the target design of BJ-6, a 6MV medical linear electron accelerator, by using Monte Carlo method. By using MC codes of MCNP and BEAMnrc, simulations are given to calculate the percent depth dose profiles in the 10cm×10cm field and the 30cm×30cm field respectively. The surface dose satisfies the national standards and the dose rate in treatment increases 10 percent of that of the present thick-target. The feasibility of this method has been tested by experiment.

HTML

Reference (1)

A Method to Increase the Dose Rate of Medical Linear Electron Accelerators by Considering the Target and the Flattening Filter as a Whole System When Designing the Target

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article