公开(公告)号：US20240046417A1

公开(公告)日：2024-02-08

申请号：US18035990

申请日：2021-09-03

Applicant: HITACHI, LTD.

Inventor： Kumiko KONISHI ,  Akio YONEYAMA ,  Hiroyuki OKINO

IPC: G06T5/20 ,  G06T5/00 ,  G06T5/40 ,  G06T5/50 ,  G06T7/00 ,  G06V10/60

CPC classification number: G06T5/20 ,  G06T5/002 ,  G06T5/40 ,  G06T5/50 ,  G06T7/0008 ,  G06V10/60 ,  G06T2207/20221 ,  G06T2207/30148

Abstract: An image processing device for removing a noise having directionality in a first direction from an image containing the noise without affecting information on minute shading of luminance of the image, including: a high-pass filter unit configured to perform filtering processing on an image containing a noise having directionality in a horizontal direction with a high-pass filter in the horizontal direction; a low-pass filter unit configured to perform filtering processing on the image in a vertical direction with a low-pass filter; and an addition unit configured to add an image processed by the high-pass filter unit and an image processed by the low-pass filter unit.

公开(公告)号：US20170003233A1

公开(公告)日：2017-01-05

申请号：US15114091

申请日：2014-02-26

Applicant: HITACHI, LTD.

Inventor： Akio YONEYAMA ,  Rika BABA ,  Keisuke YAMAKAWA

IPC: G01N23/04 ,  G01N23/20

CPC classification number: G01N23/046 ,  G01N23/04 ,  G01N23/20 ,  G01N2223/056 ,  G01N2223/3306 ,  G01N2223/419 ,  G01N2223/423

Abstract: An object of the present invention is to non-destructively obtain, in an X-ray imaging apparatus, a sectional image of a subject with spatial resolution higher than spatial resolution of an image detector. In the present invention, the image detector is two-dimensionally moved with respect to an incident X-ray for each half (180°) rotation of the subject, and a plurality of image groups (CT data sets) is obtained at different positions of the image detector. An image (sinogram) is synthesized from each image group thus obtained, which image is equal to an image obtained with a detector whose pixel size is smaller than the pixel size constituting the above described image detector. From this synthesized image, a sectional image with high spatial resolution is calculated by reconstruction calculation.

Abstract translation: 本发明的目的是在X射线成像设备中非破坏性地获得具有高于图像检测器的空间分辨率的空间分辨率的被摄体的截面图像。 在本发明中，对于被摄体的每半（180°）旋转，图像检测器相对于入射X射线二维移动，并且在不同位置处获得多个图像组（CT数据集） 图像检测器。 从如此获得的每个图像组合成图像（正弦图），该图像等于其像素尺寸小于构成上述图像检测器的像素尺寸的检测器获得的图像。 从该合成图像，通过重建计算来计算具有高空间分辨率的截面图像。