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2. 发明申请

US20110293064A1 X-RAY DARK-FIELD IMAGING SYSTEM AND METHOD 有权
标题翻译： X射线暗场成像系统及方法
公开(公告)号：US20110293064A1
公开(公告)日：2011-12-01
申请号：US13147952
申请日：2010-07-06
申请人： Zhifeng Huang , Zhiqiang Chen , Li Zhang , Zhentian Wang , Yuxiang Xing , Ziran Zhao , Yongshun Xiao
发明人： Zhifeng Huang , Zhiqiang Chen , Li Zhang , Zhentian Wang , Yuxiang Xing , Ziran Zhao , Yongshun Xiao
IPC分类号： A61B6/03 , G01N23/201
CPC分类号： G01N23/04 , B82Y10/00 , G01N23/20075 , G21K2201/061 , G21K2207/005
摘要： An x-ray imaging technology, performing an x-ray dark-field CT imaging of an examined object using an imaging system which comprises an x-ray source, two absorbing gratings G1 and G2, an x-ray detector, a controller and a data processing unit, comprising the steps of: emitting x-rays to the examined object; enabling one of the two absorbing gratings G1 and G2 to perform phase stepping motion within at least one period range thereof; where in each phase stepping step, the detector receives the x-ray and converts it into an electric signal; wherein through the phase stepping of at least one period, the x-ray intensity at each pixel point on the detector is represented as an intensity curve; calculating a second moment of scattering angle distribution for each pixel, based on a contrast of the intensity curve at each pixel point on the detector and an intensity curve without presence of the examined object; taking images of the object at various angles, then obtaining an image with scattering information of the object in accordance with a CT reconstruction algorithm.
摘要翻译：一种X射线成像技术，使用包括x射线源，两个吸收光栅G1和G2，x射线检测器，控制器和控制器的成像系统对检查对象进行X射线暗场CT成像数据处理单元，包括以下步骤：向被检查对象发射X射线; 使得两个吸收光栅G1和G2中的一个能够在其至少一个周期范围内执行相位步进运动; 在每个相位步进步骤中，检测器接收x射线并将其转换为电信号; 其中通过至少一个周期的相位步进，将检测器上每个像素点处的x射线强度表示为强度曲线; 基于检测器上的每个像素点处的强度曲线的对比度和不存在检查对象的强度曲线，计算每个像素的散射角分布的第二时刻; 以各种角度拍摄对象的图像，然后根据CT重建算法获得具有对象的散射信息的图像。

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