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1. 发明申请

WO2016209138A1 SCATTER ESTIMATION AND/OR CORRECTION IN X-RAY IMAGING 审中-公开
标题翻译： X射线成像中的散射估计和/或校正
公开(公告)号：WO2016209138A1
公开(公告)日：2016-12-29
申请号：PCT/SE2015/051072
申请日：2015-10-08
申请人： PRISMATIC SENSORS AB
发明人： DANIELSSON, Mats , HOFFMAN, David Michael
IPC分类号： G01T1/24 , A61B6/00 , G01T1/29 , G01T1/36
CPC分类号： A61B6/5282 , A61B6/032 , A61B6/4233 , A61B6/4241 , A61B6/4266 , A61B6/4291 , G01T1/2985
摘要： There is provided methods and devices for estimating object scatter and/or internal scatter in a multi-level photon-counting x-ray detector (102, 103), as well as methods and devices for x-ray tomographic imaging of an object while correcting for object scatter and/or internal scatter. The x-ray detector has at least two layers of detector diodes mounted in an edge- on geometry, e.g. designed for 1 ) estimating the object scatter contribution to the counts in a top layer of said at least two layers based on difference(s) in counts between the top layer and lower layer(s) under the assuption the object scatter has a slowly varying spatial distribution, and/or 2) estimating counts from reabsorption of photons that have Compton scattered inside the detector based on selectively blinding some detector elements from primary radiation by placing a highly attenuating beam stop on top of the detector elements, in lower layer(s) or in both top layer and lower layer(s), and measuring the counts in those detector elements.
摘要翻译：提供了用于估计多级光子计数X射线检测器（102,103）中的物体散射和/或内部散射的方法和装置，以及用于物体的X射线层析成像的方法和装置，同时校正用于物体散射和/或内部散射。 x射线检测器具有安装在边缘几何上的至少两层检测器二极管，例如。设计用于1）基于所述顶层和下层之间的计数的差异来估计对所述至少两个层的顶层中的计数的对象散射贡献，所述对象散射具有缓慢变化空间分布和/或2）基于通过将检测器元件的高度衰减的光束停止放置在检测器元件的顶部的下层（s）中，基于通过选择性地将一些检测器元件从初级辐射中盲目地估计具有康普顿散射在检测器内部的光子的重新吸收的计数）或在顶层和下层中，并且测量那些检测器元件中的计数。

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