摘要
为获得近似单能的窄谱X射线源,本文设计了一种双靶结构的X光管。仿真实验结果表明通过设置不同材料的靶可以得到不同能量段的窄谱X射线。由于第二个靶设置在X光管的外部,可以方便的实现能量切换。此外,本文还利用仿真方法验证了窄谱X射线源在减轻硬化伪影方面的作用。本文的研究结果可为研制窄谱X射线源提供参考。
In order to generate X-ray with narrow spectrum, we design a novel X-ray tube which is of dualtarget structure. We have performed computer simulation to verify the validity of this design, using Monte Carlo simulation package GEANT4. Simulation results show that X-ray with narrow spectrums which condense on a certain energy band corresponding to the material of targets can be generated. Moreover, the effectiveness of narrow spectrum X-ray in comparison with broad spectrum X-ray in reducing beam-hardening artifacts is demonstrated. Also, the work can provide references for researchers and manufacturers who want to acquire X-ray source with narrow spectrum.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2008年第5期999-1004,共6页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金(60472071
60532080)
北京市自然科学基金(4051002)
关键词
窄谱X射线
仿真
GEANT4
双靶X光管
X-ray with narrow band spectrum
simulation
GEANT4
dual-target X-ray tube
