Analysis of field of view limited by a multi-line X-ray source and its improvement for grating interferometry
Analysis of field of view limited by a multi-line X-ray source and its improvement for grating interferometry
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多线X射线源视场限制分析及光栅干涉测量改进
DOI：
10.1007/s00216-012-6178-1
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发表时间：
2012-06
影响因子：
4.3
通讯作者：
Niu Hanben
中科院分区：
文献类型：
--
作者：
Du Yang;Huang Jianheng;Lin Danying;Niu Hanben
基于光栅干涉的X射线相衬成像是一种具有同时提供吸收、微分相衬和暗场信号的潜力的技术。最近在光栅干涉测量中使用的多线X射线源具有高能X射线的优点，用于大多数临床和工业研究的厚样品的成像。然而，由于X射线发射区域的轴向延伸，其具有有限视场（FOV）的缺点。本文从菲涅耳衍射理论出发，分析了多线X射线源轴向扩展对视场的影响及其改进。计算机模拟结果表明，FOV的限制，可以克服使用一个替代的X射线管与一个特殊设计的多步阳极。这种新设计的X射线源的FOV可以比相同发射区域中的多线X射线源的FOV大大约四倍。这对于X射线相衬成像在材料科学、生物学、医学和工业中的应用可能是有益的。图使用多阶X射线源的五条线的观察平面上的可见性图
X-ray phase-contrast imaging based on grating interferometry is a technique with the potential to provide absorption, differential phase contrast, and dark-field signals simultaneously. The multi-line X-ray source used recently in grating interferometry has the advantage of high-energy X-rays for imaging of thick samples for most clinical and industrial investigations. However, it has a drawback of limited field of view (FOV), because of the axial extension of the X-ray emission area. In this paper, we analyze the effects of axial extension of the multi-line X-ray source on the FOV and its improvement in terms of Fresnel diffraction theory. Computer simulation results show that the FOV limitation can be overcome by use of an alternative X-ray tube with a specially designed multi-step anode. The FOV of this newly designed X-ray source can be approximately four times larger than that of the multi-line X-ray source in the same emission area. This might be beneficial for the applications of X-ray phase contrast imaging in materials science, biology, medicine, and industry.FigureVisibility map on the observation plane using five lines of the multi-step X-ray source
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影响因子：
3.8
作者：
Kottler, C.;David, C.;Bunk, O.
通讯作者：
Bunk, O.
影响因子：
4.3
作者：
Zhili Wang;P. Zhu;Wanxia Huang;Q. Yuan;Xiaosong Liu;Kai Zhang;Youli Hong;Huitao Zhang;Xin G
通讯作者：
Zhili Wang;P. Zhu;Wanxia Huang;Q. Yuan;Xiaosong Liu;Kai Zhang;Youli Hong;Huitao Zhang;Xin G
影响因子：
19.6
作者：
Pfeiffer, F;Weitkamp, T;David, C
通讯作者：
David, C
影响因子：
82.9
作者：
Momose, A;Takeda, T;Hirano, K
通讯作者：
Hirano, K
影响因子：
3.5
作者：
Fitzgerald, R
通讯作者：
Fitzgerald, R