An extended diffraction-enhanced imaging method for implementing multiple-image radiography
An extended diffraction-enhanced imaging method for implementing multiple-image radiography
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DOI：
10.1088/0031-9155/52/7/011
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发表时间：
2007-04-07
影响因子：
3.5
通讯作者：
Zhong, Zhong
中科院分区：
文献类型：
--
作者：
Chou, Cheng-Ying;Anastasio, Mark A.;Zhong, Zhong
衍射增强成像（DEI）是一种基于分析仪的X射线成像方法，其产生描绘物体的投影X射线吸收和折射特性的单独图像。由于DEI的成像模型不考虑超小角X射线散射（USAXS），因此DEI中产生的图像可能包含医学成像应用中的伪影和不准确性。在这项工作中，我们研究了一种扩展的DEI方法，用于同时重建三个图像，描绘了物体的投影X射线吸收，折射和USAXS属性。扩展的DEI方法可以被看作是最近提出的多图像射线照相范例的实现。通过使用计算机模拟和同步加速器测量数据进行验证研究。
Diffraction-enhanced imaging ( DEI) is an analyser-based x-ray imaging method that produces separate images depicting the projected x-ray absorption and refractive properties of an object. Because the imaging model of DEI does not account for ultra-small-angle x-ray scattering (USAXS), the images produced in DEI can contain artefacts and inaccuracies in medical imaging applications. In this work, we investigate an extended DEI method for concurrent reconstruction of three images that depict an object's projected x- ray absorption, refraction and USAXS properties. The extended DEI method can be viewed as an implementation of the recently proposed multiple-image radiography paradigm. Validation studies are conducted by use of computer-simulated and synchrotron measurement data.