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    • 3. 发明公开
    • PHASE CONTRAST RADIATION IMAGING DEVICE
    • PHASENKONTRAST-STRAHLUNGSABBILDUNGSVORRICHTUNG
    • EP2633813A4
    • 2013-12-25
    • EP11835868
    • 2011-10-28
    • FUJIFILM CORP
    • MURAKOSHI DAIAGANO TOSHITAKAITO WATARUIMAI SHINJI
    • A61B6/00G01N23/04G01T7/00
    • A61B6/484A61B6/4233A61B6/4291A61B6/4464A61B6/502G01N23/046G01N2223/419G01N2223/612G01T1/246G21K2207/005
    • [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.
    • [要解决的问题]一种射线照相相衬成像装置包括两个光栅,其包括以预定间隔彼此平行地定位的第一光栅和第二光栅,并且使用这些光栅获得射线照相相位对比图像,其中, 通过单个成像操作获得用于获得射线照相相衬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,通过获得读取的图像信号获得对应于位于相对于预定方向的彼此不同位置的不同像素组的条纹图像的图像信号 将包括在预定方向上以预定数量的像素的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输出,其中,预定方向是与周期方向平行或交叉的方向 除了与莫尔图案的周期方向正交的方向以外的莫尔图案。 然后,基于所获得的条纹图像的图像信号来生成相位对比图像。