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1. 发明申请

WO2020106197A1 X-RAY IMAGING SYSTEM FOR PHASE CONTRAST IMAGING USING PHOTON-COUNTING EVENTS 审中-公开
公开(公告)号：WO2020106197A1
公开(公告)日：2020-05-28
申请号：PCT/SE2019/051010
申请日：2019-10-14
申请人： PRISMATIC SENSORS AB
发明人： DANIELSSON, Mats , SUNDBERG, Christel
IPC分类号： G01T1/24 , A61B6/03 , G01N23/04 , G01T1/29
摘要： There is provided an x-ray imaging system (100) comprising an x-ray source (10), and an associated x-ray detector (20), wherein the x-ray detector (20) is a photon counting x-ray detector for enabling detection of photon-counting events. The x-ray imaging system (100) is configured for enabling acquisition of at least one phase contrast image based on detected photon-counting events. The x-ray detector (20) is based on a number of x-ray detector sub-modules, also referred to as wafers, each of which comprises detector elements, wherein the x-ray detector sub-modules are oriented in edge-on geometry with their edge directed towards the x-ray source, assuming the x- rays enter through the edge. Each x-ray detector sub-module or wafer has a thickness with two opposite sides of different potentials to enable charge drift towards the side, where the detector elements, also referred to as pixels, are arranged. The x-ray imaging system (100) is further configured to determine an estimate or measure of charge diffusion originating from a Compton interaction or an interaction through photoeffect related to an incident x-ray photon in an x-ray detector sub-module or wafer of the x-ray detector, and to determine an estimate of a point of interaction of the incident x-ray photon in the x-ray detector sub-module based on the determined estimate or measure of charge diffusion.

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