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1. 发明公开

EP2633813A1 PHASE CONTRAST RADIATION IMAGING DEVICE 有权
标题翻译： PHASENKONTRAST-STRAHLUNGSABBILDUNGSVORRICHTUNG
公开(公告)号：EP2633813A1
公开(公告)日：2013-09-04
申请号：EP11835868.8
申请日：2011-10-28
申请人： FUJIFILM Corporation
发明人： MURAKOSHI, Dai , AGANO, Toshitaka , ITO, Wataru , IMAI, Shinji
IPC分类号： A61B6/00 , G01N23/04 , G01T7/00
CPC分类号： A61B6/484 , A61B6/4233 , A61B6/4291 , A61B6/4464 , A61B6/502 , G01N23/046 , G01N2223/419 , G01N2223/612 , G01T1/246 , G21K2207/005
摘要： [Problem to be solved] A radiographic phase-contrast imaging apparatus includes two gratings including the first grating and the second grating, which are positioned parallel to each other at a predetermined interval, and obtains a radiographic phase-contrast image using these gratings, wherein a plurality of fringe images used to obtain a radiographic phase-contrast image are obtained by a single imaging operation.
[Solution] The first and second gratings are adapted to form a moire pattern when a periodic pattern image formed by the first grating is superimposed on the second grating. Based on an image signal of the moire pattern detected by the radiographic image detector, image signals of the fringe images, which correspond to different pixel groups located at different positions from one another with respect to a predetermined direction, are obtained by obtaining image signals read out from pixels of each pixel group, which includes pixels arranged at intervals of a predetermined number of pixels in the predetermined direction, as the image signal of each fringe image, where the predetermined direction is a direction parallel to or a direction intersecting a period direction of the moire pattern other than a direction orthogonal to the period direction of the moire pattern. Then, a phase-contrast image is generated based on the obtained image signals of the fringe images.
摘要翻译： [待解决的问题]射线相位成像装置包括两个光栅，包括第一光栅和第二光栅，它们以预定的间隔彼此平行地定位，并且使用这些光栅获得射线照相相位对比图像，其中通过单次成像操作获得用于获得射线照相相位差图像的多个条纹图像。 [解决方案]当由第一光栅形成的周期性图案图像叠加在第二光栅上时，第一和第二光栅适于形成莫尔图案。基于由放射线照相图像检测器检测到的莫尔图案的图像信号，通过读取读取的图像信号，获得对应于相对于预定方向彼此不同位置处的不同像素组的条纹图像的图像信号从包括在预定方向上以预定数量的像素间隔排列的像素的每个像素组的像素作为每个条纹图像的图像信号，其中预定方向是与周期方向相交的方向或与周期方向相交的方向的波纹图案除了与波纹图案的周期方向正交的方向之外。然后，基于获得的条纹图像的图像信号生成相位对比图像。

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