X-ray CT apparatus and X-ray CT apparatus radiography

• US 20030076921A1
• Filed: 11/27/2002
• Published: 04/24/2003
• Est. Priority Date: 02/23/2001
• Status: Abandoned Application

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Mihara, Kazumasa, Hori, Keiichi, Kaminou, Yuichiro, Ogura, Shin
• Application Number:
  US10/305,084
• Publication Number:
  US 20030076921A1
• Time in Patent Office: Days
• US Class Current: 378/4
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/4007 characterised by using a plurality of source units
• CPC Class Codes: A61B 6/4085 Cone-beams
• CPC Class Codes: A61B 6/4275 using a detector unit almost surrounding the patient, e.g. more than 180°

Abstract

An X-ray CT apparatus according to the present invention comprises a plurality of X-ray generating means which generate X-rays, surround a measuring object, are arranged on a circle with the measuring object at the center, and are relatively movable with respect to the measuring object, a detector which surrounds the measuring object, is arranged on a circle with the measuring object at the center, is relatively movable with respect to the measuring object, and detects X-rays emitted from the X-ray generating means and transmitted through the measuring object, and X-ray generation controlling means which selects use/non-use of each of the X-ray generating means, and a mode setting directing means for directing a desired operation mode with respect to the X-ray generation controlling means.

Claims

1. An X-ray CT apparatus comprising:

a plurality of X-ray generating means which generate X-rays, surround a measuring object, are arranged on a circle with said measuring object at the center, and are relatively movable with respect to said measuring object;

a detector which surrounds said measuring object and is arranged on a circle with said measuring object at the center, is relatively movable with respect to said measuring object, and detects X-rays emitted from said X-ray generating means and transmitted through said measuring object;

X-ray generation controlling means for selecting use/non-use of each of said X-ray generating means; and

mode setting directing means for directing a desired operation mode with respect to said X-ray generation controlling means.

2. The X-ray CT apparatus according to claim 1, wherein plural lines of said detectors are provided in a direction of relative movement of said measuring object and said X-ray generation devices.

3. The X-ray CT apparatus according to claim 1, wherein said mode setting directing means has a signal ray source radiography mode which causes said X-ray generation controlling means to switch one of a plurality of said X-ray generating means and sequentially use them.

4. The X-ray CT apparatus according to claim 2, wherein said mode setting directing means has a signal ray source radiography mode which causes said X-ray generation controlling means to switch one of a plurality of said X-ray generating means and sequentially use them.

5. The X-ray CT apparatus according to claim 1, wherein said mode setting directing means has a multiple source synchronous radiography mode which causes said X-ray generation controlling means to simultaneously switch a plurality of said X-ray generating means distanced at predetermined intervals in a circumferential direction among a plurality of said X-ray generating means and sequentially use them.

6. The X-ray CT apparatus according to claim 2, wherein said mode setting directing means has a multiple source synchronous radiography mode which causes said X-ray generation controlling means to simultaneously switch a plurality of said X-ray generating means distanced at predetermined intervals in a circumferential direction among a plurality of said X-ray generating means and sequentially use them.

7. The X-ray CT apparatus according to claim 5, wherein said multiple ray source synchronous radiography mode simultaneously uses a plurality of arbitrary X-ray generating means whose X-rays emitted therefrom do not overlap each other on said detector.

8. The X-ray CT apparatus according to claim 6, wherein said multiple ray source synchronous radiography mode simultaneously uses a plurality of arbitrary X-ray generating means whose X-rays emitted therefrom do not overlap each other on said detector.

9. The X-ray CT apparatus according to claim 1, wherein said mode setting directing means has a sector slice mode which causes said X-ray generation controlling means to switch said X-ray generating means which form a continuous part of said X-ray generating means group among a plurality of said X-ray generating means and sequentially use them.

10. The X-ray CT apparatus according to claim 2, wherein said mode setting directing means has a sector slice mode which causes said X-ray generation controlling means to switch said X-ray generating means which form a continuous part of said X-ray generating means group among a plurality of said X-ray generating means and sequentially use them.

11. The X-ray CT apparatus according to claim 1, wherein said mode setting directing means has a single shot mode which causes said X-ray generation controlling means to use one of said respective X-ray generating means for one time or simultaneously use a plurality of said X-ray generating means for one time.

12. The X-ray CT apparatus according to claim 2, wherein said mode setting directing means has a single shot mode which causes said X-ray generation controlling means to use one of said respective X-ray generating means for one time or simultaneously use a plurality of said X-ray generating means for one time.

13. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 1;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

14. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 2;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

15. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 3;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

16. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 4;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

17. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 5;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

18. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 6;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

19. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 7;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

20. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 8;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

21. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 9;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

22. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 10;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

23. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 11;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.

24. An X-ray CT apparatus radiography comprising:

obtaining information required for a tomogram of said measuring object by using said X-ray CT apparatus defined in claim 12;

operating said X-ray generating means suitable for radiography of a specific part of said measuring object based on a tomogram constituted from said information; and

radiographing said measuring object without changing a posture of said measuring object.