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Radioative ray camera

A photography device and radiation technology, which is applied in photography, instruments for radiation diagnosis, radiation measurement, etc., can solve the problems of heavy device weight, increased weight, complicated structure, etc.

Inactive Publication Date: 2006-10-04
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with other metals, lead has low rigidity and is difficult to handle, so it is necessary to have a supporting member, which complicates the structure
again Figure 7 In the configuration, since an X-ray shielding member of the same size as the 2D array sensor is required, the weight of the device becomes heavy when lead with a high density is used for the X-ray shielding member
In particular, in portable (portable) X-ray imaging apparatus (also referred to as electronic cassette or cassette-type radiography apparatus) incorporating a two-dimensional array sensor, which tends to increase in weight compared with conventional film cassettes, ), the greater the weight, the more inconvenient it is to carry it by hand, not only that, but it also becomes difficult to set up the subject

Method used

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  • Radioative ray camera
  • Radioative ray camera
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Experimental program
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Effect test

no. 1 Embodiment approach

[0054] figure 1 It is a schematic cross-sectional view showing the configuration of the X-ray imaging apparatus in the first embodiment of the present invention. In addition, for the previously described Figure 5-7 The same constituent elements are given the same reference numerals, and their descriptions are omitted.

[0055] and Figure 6 The difference is that instead of the X-ray shielding member 21, the X-ray shielding member is configured using different materials according to different regions. exist figure 1 In the example shown, in the area corresponding to the circuit board 1, the X-ray shielding member 2 is formed, in the area corresponding to the component 3, the X-ray shielding member 4 is formed, and in the area corresponding to the protective layer 5, the X-ray shielding member 2 is formed. In the member 6, the material of the X-ray shielding member is changed according to the arrangement of each element. The material of each X-ray shielding member 2, 4,...

no. 2 Embodiment approach

[0111] image 3 It is a schematic cross-sectional view showing the configuration of an X-ray imaging apparatus according to a second embodiment of the present invention. In addition, for the previously described figure 1 The same constituent elements are given the same reference numerals, and their descriptions are omitted.

[0112] and figure 1 The difference is that it is constructed with an X-ray shielding member whose thickness varies depending on the area. In the area A corresponding to the circuit board 1, the thinnest X-ray shielding member 9 is formed, in the area B corresponding to the element 3, an X-ray shielding member 10 of intermediate thickness is formed, and in the area C corresponding to the protective layer 5, the The thickest X-ray shielding member 11 has different thicknesses of the X-ray shielding member according to the arrangement of each element. The respective thicknesses of the X-ray shielding members 9, 10, 11 are selected such that the amount ...

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Abstract

A radiographic apparatus includes photoelectric converter elements for converting a radiographic image of an object into image signals and a shield member for shielding the photoelectric converter elements from scattered rays arising within the radiographic apparatus from radiation passing through the photoelectric converter elements. The shield member has a plurality of areas, in which at least one of a radiation transmittivity and a radiation scattering probability varies.

Description

technical field [0001] The present invention relates to a radiographic apparatus having an imaging unit including a plurality of photoelectric conversion elements. Background technique [0002] The method of irradiating a subject with radiation, detecting the intensity distribution of the radiation transmitted through the subject, and obtaining a radiographic image of the subject is generally widely used in industrial non-destructive inspection and medical diagnosis. A specific example of a general method for obtaining a radiographic image of an object is a method in which a so-called "fluorescent plate" (or intensifying screen) that excites fluorescence with radiation and a silver salt film are combined, and the transparent film is separated by the fluorescent plate. After the radiation of the subject is converted into visible light, a latent image is formed on the silver salt film with the help of the visible light, and the silver salt film is chemically processed to obtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B42/02A61B6/03G01T1/20A61B6/00A61B6/06G01N23/04G01T7/00
CPCG01N23/04A61B6/06
Inventor 山本理
Owner CANON KK