X-ray image photographing apparatus and grid device

• US 20020126800A1
• Filed: 02/04/2002
• Published: 09/12/2002
• Est. Priority Date: 09/11/1998
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Tsujii, Osamu, Matsumoto, Kazuhiro
• Granted Patent: US 6,850,597 B2
• Time in Patent Office: Days
• US Class Current: 378/154
• CPC Class Codes: A61B 6/06 Diaphragms
• CPC Class Codes: A61B 6/4291 the detector being combined with a grid or grating
• CPC Class Codes: G21K 5/00 Irradiation devices discharge tubes for irradiating H01J37/00

Abstract

An X-ray image photographing apparatus includes an image obtaining portion for obtaining an X-ray distribution transmitted through an object, a grid detecting system having a construction for obtaining information from a grid side by the action of inserting the grid for decreasing scattered rays into the apparatus, and detecting at least one of the presence or absence of the grid, the kind of the grid and the presence or absence of the replacement of the grid by the use of the construction, an image processing system for image processing and outputting image data collected by the image obtaining portion, and a memory portion preserving therein a plurality of sets of image processing parameters for controlling the image processing system. The image processing system selects the image processing parameters preserved in the memory on the basis of at least the result of the detection by the grid detecting system and executes image processing.

Claims

1. An X-ray image photographing apparatus having:

a photographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection system for obtaining information from said grid unit or by using said grid unit, and detecting at least one of presence or absence of the grid, a kind of the grid and presence or absence of replacement of the grid; and

a control portion for executing photographing or image processing on the basis of at least the result of the detection by said grid detection system.

2. The apparatus of claim 1, wherein said control portion having:

an image-processing system for image-processing and outputting image data collected by said image obtaining portion; and

a memory portion preserving therein parameters used in said image processing system;

wherein said image processing system selects at least one of said parameters preserved in said memory portion on the basis of at least the result of the detection by said grid detection system and executes image processing.

3. The apparatus of claim 1, wherein further having:

an image analyzing portion for effecting determination of a kind of the grid, on the basis of at least the result of the detection by said grid detection system, by analyzing image data obtained by said image obtaining portion with the grid fixed.

4. The apparatus of claim 1, wherein the detection by said grid detection system is effected when the grid unit is mounted on said photographing portion.

5. The apparatus of claim 1, wherein said image obtaining portion has a semiconductor sensor.

6. The apparatus of claim 1, wherein said image obtaining portion has a fluorescent material sheet.

7. The apparatus of claim 1, wherein said grid detection system has a switch member which effects switching corresponding to a shape of a predetermined region of said grid unit, and at least one of presence or absence of said grid, a kind of the grid and presence or absence of replacement of the grid is detected by the switching of said switch member.

8. The apparatus of claim 1, further having:

an inputting portion by which photographing information as to which portion of the object is photographed is input;

wherein said control portion having a judging portion for judging the propriety of the adaptation of the grid on the basis of at least the photographing information input by said inputting portion and the result of the detection by said grid detection system.

9. The apparatus of claim 8, wherein said control portion further having a grid memory portion preserving therein information of an applicable grid corresponding to the photographing information.

10. The apparatus of claim 8, further having a display portion for displaying the result of the judgment of said judging portion.

30. A computer-readable medium storing a program code at least by which a computer realizes functions of the apparatus according to any one of claims 1-29.

11. An X-ray image photographing apparatus having:

sensor means for obtaining a distribution of X-ray having transmitted through an object;

housing means for housing said sensor means, and can mount a grid unit including at least a grid for removing scattered rays from the object;

grid detecting means for obtaining information from said grid unit or by using said grid unit to thereby detect at least one of presence or absence of the grid, a kind of the grid and presence or absence of replacement of the grid; and

control means for executing photographing or image processing on the basis of at least the result of the detection by said grid detection means.

12. The apparatus of claim 11, wherein said control means having:

image processing means for determining an image processing parameter on the basis of at least the result of the detection by said grid detection means for image data collected by said sensor means and executing image processing.

13. The apparatus of claim 11, wherein further having:

image analyzing means for effecting determination of a kind of the grid, on the basis of at least the result of the detection by said grid detection means, by analyzing image data obtained by said sensor means with the grid fixed.

14. The apparatus of claim 11, wherein the detection by said grid detection means is effected when the grid unit is mounted on said housing means.

15. The apparatus of claim 11, wherein said grid detection means having switch means which effects switching correspondingly to a shape of a predetermined region of said grid unit, and at least one of presence or absence of the grid, a kind of the grid and presence or absence of replacement of the gird is detected by the switching of said switch means.

16. The apparatus of claim 11, further having:

input means for inputting photographing information as to which portion of the object is photographed;

wherein said control means having judging means for judging the propriety of the adaptation of the grid on the basis of at least the photographing information input by said input means and the result of the detection by said grid detection means.

17. The apparatus of claim 16, further having display means for displaying the result of the judgment of said judging means.

19. The device of claim 18, wherein said information providing means has a projection for operating a micro switch provided on said X-ray image photographing apparatus.

20. The device of claim 18, wherein said grid is made movable relative to said frame.

18. A grid device for use in an X-ray image photographing apparatus having:

a grid;

a frame holding said grid; and

information providing means provided on said frame, said information providing means being designated to provide information concerning at least one of presence or absence of the grid, a kind of the grid and presence or absence of replacement of the grid to said X-ray image photographing apparatus.

21. An X-ray image photographing apparatus having:

a photographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection system detecting at least one of presence or absence of the grid, a kind of the grid and presence or absence of replacement of the grid; and

an image processing system for determining an image processing parameter concerning at least one of gain correction, frequency processing, contrast processing and image compression on the basis of at least the result of the detection by said grid detection system for image data obtained by said image obtaining portion and executing image processing.

22. A radiographic apparatus comprising:

a radiographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection portion for obtaining information from said grid unit or by using said grid unit, and detecting information concerning the grid; and

a control portion for executing radiographing or image processing on the basis of at least the result of the detection by said grid detection portion.

26. The apparatus according to claim 25, wherein the apparatus being designed to provide said information concerning the grid to an external apparatus.

23. A grid device for use in a radiographic apparatus comprising:

a grid;

a frame holding said grid; and

information providing portion provided on said frame, said information providing portion being designed to provide information concerning the grid to said radiographic apparatus.

24. A radiographic apparatus comprising:

a radiographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection portion detecting information concerning the grid; and

an image processing portion for determining an image processing parameter concerning at least one of gain correction, frequency processing, contrast processing and image compression on the basis of at least the result of the detection by said grid detection portion for image data obtained by said image obtaining portion and executing image processing.

25. A radiographic apparatus comprising:

a radiographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object; and

a grid detection portion for obtaining information from said grid unit or by using said grid unit, and detecting information concerning the grid.

27. A radiographic apparatus comprising:

a radiographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection portion for obtaining information from said grid unit or by using said grid unit, and detecting information concerning the grid;

a pixel density detection portion for detecting information concerning a pixel density of said image obtaining portion; and

a control portion for executing radiographing or image processing on the basis of at least the results of the detection by said grid detection portion and said pixel density detection portion.

28. A radiographic apparatus comprising:

a radiographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection portion detecting information concerning the grid;

a pixel density detection portion for detecting information concerning a pixel density of said image obtaining portion; and

an image processing portion for determining an image processing parameter concerning at least one of gain correction, grid erasing processing, frequency processing, contrast processing and image compression on the basis of at least the results of the detection by said grid detection portion and said pixel density detection portion for image data obtained by said image obtaining portion and executing image processing.

29. A radiographic apparatus comprising:

a radiographing portion having an image obtaining portion for obtaining a distribution of X-ray having transmitted through an object, and can mount a grid unit including at least a grid for removing scattered rays from the object;

a grid detection portion for obtaining information from said grid unit or by using said grid unit, and detecting information concerning the grid; and

a pixel density indication portion for indicating information concerning a pixel density of said image obtaining portion to an external apparatus.