公开(公告)号：US20150279497A1

公开(公告)日：2015-10-01

申请号：US14725456

申请日：2015-05-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Toru Den ,  Kimiaki Yamaguchi ,  Chidane Ouchi

IPC: G21K1/06 ,  G01N23/20

CPC classification number: G21K1/067 ,  A61B6/484 ,  G01N23/046 ,  G01N23/20075 ,  G01N2223/419 ,  G21K2207/005

Abstract: An X-ray imaging apparatus comprises a grating configured to form an interference pattern by diffracting X-rays from an X-ray source, a amplitude grating configured to partly shield X-rays forming the interference pattern, and an X-ray detector configured to detect an intensity distribution of X-rays from the amplitude grating. The amplitude grating is comprised of a central area and a peripheral area and the peripheral area shows an X-ray transmittance higher than the central area relative to X-rays perpendicularly entering the amplitude grating.

Abstract translation: 一种X射线摄像装置，其特征在于，包括：被配置为通过衍射来自X射线源的X射线形成干涉图案的光栅;被配置为部分地屏蔽形成所述干涉图案的X射线的振幅光栅;以及X射线检测器， 检测来自幅度光栅的X射线的强度分布。 振幅光栅由中心区域和外围区域组成，周边区域相对于垂直进入振幅光栅的X射线，显示高于中心区域的X射线透射率。

公开(公告)号：US08537966B2

公开(公告)日：2013-09-17

申请号：US13682445

申请日：2012-11-20

Applicant: Canon Kabushiki Kaisha

Inventor： Chidane Ouchi ,  Kentaro Nagai ,  Toru Den ,  Hidenosuke Itoh

IPC: G03H5/00

CPC classification number: G06T7/0002 ,  A61B6/4291 ,  A61B6/484 ,  G01J9/02 ,  G01N23/04 ,  G01N23/20075 ,  G01N2223/401 ,  G21K1/06 ,  G21K2201/06 ,  G21K2201/067

Abstract: An X-ray imaging apparatus includes a phase grating, an absorption grating, a detector, and an arithmetic unit. The arithmetic unit executes a Fourier transform step of performing Fourier transform for an intensity distribution of a Moiré acquired by the detector, and acquiring a spatial frequency spectrum. Also, the arithmetic unit executes a phase retrieval step of separating a spectrum corresponding to a carrier frequency from a spatial frequency spectrum acquired in the Fourier transform step, performing inverse Fourier transform for the separated spectrum, and acquiring a differential phase image.

Abstract translation: X射线成像装置包括相位光栅，吸收光栅，检测器和运算单元。 算术单元执行对由检测器获取的莫尔的强度分布执行傅里叶变换并获取空间频谱的傅里叶变换步骤。 此外，运算单元执行相位检索步骤，从傅里叶变换步骤中获取的空间频谱中分离出与载波频率对应的频谱，对分离的频谱进行傅里叶逆变换，获取差分相位图像。

公开(公告)号：US20130070893A1

公开(公告)日：2013-03-21

申请号：US13682445

申请日：2012-11-20

Applicant: CANON KABUSHIKI KAISHA

Inventor： Chidane Ouchi ,  Kentaro Nagai ,  Toru Den ,  Hidenosuke Itoh

IPC: G01J9/02

CPC classification number: G06T7/0002 ,  A61B6/4291 ,  A61B6/484 ,  G01J9/02 ,  G01N23/04 ,  G01N23/20075 ,  G01N2223/401 ,  G21K1/06 ,  G21K2201/06 ,  G21K2201/067

Abstract: An X-ray imaging apparatus includes a phase grating, an absorption grating, a detector, and an arithmetic unit. The arithmetic unit executes a Fourier transform step of performing Fourier transform for an intensity distribution of a Moiré acquired by the detector, and acquiring a spatial frequency spectrum. Also, the arithmetic unit executes a phase retrieval step of separating a spectrum corresponding to a carrier frequency from a spatial frequency spectrum acquired in the Fourier transform step, performing inverse Fourier transform for the separated spectrum, and acquiring a differential phase image.

Abstract translation: X射线成像装置包括相位光栅，吸收光栅，检测器和运算单元。 算术单元执行对由检测器获取的莫尔的强度分布执行傅里叶变换并获取空间频谱的傅里叶变换步骤。 此外，运算单元执行相位检索步骤，从傅里叶变换步骤中获取的空间频谱中分离出与载波频率对应的频谱，对分离的频谱进行傅里叶逆变换，获取差分相位图像。

公开(公告)号：US20140270060A1

公开(公告)日：2014-09-18

申请号：US14203279

申请日：2014-03-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takashi Date ,  Genta Sato ,  Chidane Ouchi

IPC: G01N23/20

CPC classification number: G01N23/20075 ,  A61B6/4291 ,  A61B6/484

Abstract: An X-ray Talbot interferometer includes a source grating configured to spatially split X-rays emitted from an X-ray source, a diffraction grating configured to form an interference pattern with the X-rays from the source grating, and an X-ray detector configured to detect the X-rays from the diffraction grating. The X-ray Talbot interferometer further includes an angle varying unit configured to vary an angle formed by an optical axis, which is the center of a flux of the X-rays from the X-ray source, and the source grating. The angle varying unit varies the angle formed by the optical axis and the source grating from a first angle to a second angle. The X-ray detector detects the X-rays at least when the optical axis and the source grating form the first angle and when the optical axis and the source grating form the second angle.

Abstract translation: X射线Talbot干涉仪包括被配置为空间分割从X射线源发射的X射线的源光栅，被配置为与来自光栅光栅的X射线形成干涉图案的衍射光栅以及X射线检测器 被配置为检测来自衍射光栅的X射线。 X射线Talbot干涉仪还包括角度变化单元，其被配置为改变由作为来自X射线源的X射线的通量的中心的光轴和源光栅所形成的角度。 角度变化单元将由光轴和源光栅形成的角度从第一角度改变为第二角度。 至少当光轴和源光栅形成第一角度时以及当光轴和源光栅形成第二角度时，X射线检测器检测X射线。