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Radiation imaging system

A technology of radiographic imaging and radiographic images, which is applied to imaging devices, stereoscopic imaging, and instruments for radiological diagnosis. It can solve the problems of inability to obtain contrast, decrease in the accuracy of phase differential images, and inability to obtain phase contrast images. The effect of phase contrast images

Inactive Publication Date: 2012-10-17
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This raises the problem that in vivo, active soft tissues and soft materials have small X-ray absorption properties, so sufficient contrast for X-ray absorption contrast images cannot be obtained
Makes the phase differential image less accurate if the intensity variation is not sufficiently captured
Therefore, good phase contrast images cannot be obtained

Method used

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Examples

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no. 1 example

[0078] exist figure 1 and 2 Among them, an X-ray imaging system 10 according to a first embodiment of the present invention is an X-ray diagnostic apparatus for capturing an image of a subject (patient) H in a standing posture. The X-ray imaging system 10 is composed of an X-ray source 11 , an imaging unit 12 and a console 13 . The X-ray source 11 irradiates the object H with X-rays. The imaging unit 12 is opposed to the X-ray source 11, and detects X-rays passing through the object H to generate image data. The console 13 controls exposure of the X-ray source 11 and image capture of the imaging unit 12 based on an operator's operation. The console 13 also processes the image data obtained by the imaging unit 12 to generate phase contrast images.

[0079] The X-ray source holder 14 fixes the X-ray source 11 so that the X-ray source 11 can be moved in the vertical or up-down direction (x direction). The X-ray source holder 14 is suspended from the ceiling. An upright stan...

no. 2 example

[0154] Figure 15 An X-ray imaging system 60 according to a second embodiment of the invention is shown. The X-ray imaging system 60 is an X-ray diagnostic apparatus for capturing images of a subject (patient) H in a prone position. The X-ray imaging system 60 has an X-ray source 11, an imaging unit 12, and a bed or table 61 on which a subject H lies. The X-ray source 11 and the imaging unit 12 are similar or identical to those in the first embodiment. Components thereof are denoted by the same reference numerals as those of the first embodiment. Hereinafter, differences between the first and second embodiments are described. Other configurations and operations are the same as those in the first embodiment, so descriptions thereof are omitted.

[0155] In the present embodiment, the imaging unit 12 is installed under the table 62 so as to be opposed to the X-ray source 11 via the object H. As shown in FIG. The X-ray source 11 is fixed by the X-ray source holder 14 . An a...

no. 3 example

[0160] Figure 16 and 17 An X-ray imaging system 70 according to a third embodiment of the invention is shown. The X-ray imaging system 70 is an X-ray diagnostic apparatus capable of capturing images of a subject (patient) H in a standing posture and a lying posture. The rotating arm 71 holds the X-ray source 11 and the imaging unit 12 . The swivel arm 71 is rotatably coupled to the upright bracket 72 . The X-ray source 11 and the imaging unit 12 are similar or identical to those in the first embodiment. Components thereof are denoted by the same reference numerals as those of the first embodiment. Hereinafter, differences between the first and third embodiments are described. Other configurations and operations are the same as those in the first embodiment, so descriptions thereof are omitted.

[0161] The swivel arm 71 is composed of a U-shaped portion 71a having a shape similar to the letter U, and a linear portion 71b connected to one of the ends of the U-shaped port...

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Abstract

An X-ray imaging system is provided with an X-ray source (11), first and second absorption gratings (31, 32), and a flat panel detector (FPD) (30), and obtains a phase contrast image of an object H by performing imaging while moving the second absorption grating (32) in x direction relative to the first absorption grating (31). The following mathematical expression is satisfied where p1' denotes a period of a first pattern image at a position of the second absorption grating (32), and p2' denotes a substantial grating pitch of the second absorption grating (32), and DX denotes a dimension, in the x-direction, of an X-ray imaging area of each pixel of the FPD (30). Here, "n" denotes a positive integer. DX is not equal to n x (p1' x p2') / |p1' - p2'|

Description

technical field [0001] The present invention relates to a radiation imaging system for capturing images of a subject using radiation such as X-rays, and more particularly to a radiation imaging system for performing phase imaging of a subject. Background technique [0002] Since X-rays are attenuated according to the number of atoms of the elements constituting the substance and the density and thickness of the substance, X-rays are used as probes to examine the inside of the object. X-ray imaging is widely used in medical diagnosis and non-destructive inspection. [0003] In a general X-ray imaging system, an object is placed between an X-ray source for emitting X-rays and an X-ray image detector for detecting X-rays to capture an X-ray transmission image of the object. Each X-ray emitted from the X-ray source to the X-ray image detector is attenuated (absorbed) by a certain amount, which depends on the properties of the objects present on the X-ray path to the X-ray image...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00A61B6/06
CPCG21K2207/005A61B6/06A61B6/5241A61B6/4233A61B6/4464A61B6/4441A61B6/03A61B6/022A61B6/502A61B6/484A61B6/4291G21K1/06G21K1/067G21K2201/06
Inventor 村越大多田拓司阿贺野俊孝高桥健治
Owner FUJIFILM CORP
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