Transmission calculation and intensity suppression for a proton therapy system

被引：6
|
作者：
Chen, Wei [1 ]
Yang, Jun [1 ]
Qin, Bin [1 ]
Liang, ZhiKai [1 ]
Chen, Qushan [1 ]
Liu, Kaifeng [1 ]
Li, Dong [1 ]
Fan, Mingwu [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Adv Elect Engn & Technol, Wuhan 430074, Hubei, Peoples R China
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2018年 / 881卷
基金：
中国国家自然科学基金;
关键词：
Proton therapy; Energy selection system (ESS); Transmission calculation; Intensity suppression; DEGRADER;
D O I：
10.1016/j.nima.2017.10.047
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A proton therapy project HUST-PTF (HUST Proton Therapy Facility) based on a 250 MeV isochronous superconducting cyclotron is under development in Huazhong University of Science and Technology (HUST). In this paper we report the main design features of the beam line in HUST-PTF project. The energy selection system (ESS) for energy modulation is discussed in detail, including the collimators, momentum slit and transmission calculation. Due to significant difference among the transmissions of ESS for different energies, the intensity suppression scheme by defocusing beam at high energies on collimators in the beam line is proposed and discussed. Finally, the ratios of beam intensities between low and high energies are expected to be controlled within 10 to meet the clinical requirement, and the beam optics of each energy step after intensity suppression is studied respectively. (c) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：82 / 87
页数：6
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