X-ray image diagnostic apparatus that acquires position information associated with a table top

• US 9,962,139 B2
• Filed: 02/27/2015
• Issued: 05/08/2018
• Est. Priority Date: 03/10/2014
• Status: Active Grant

• Current Assignee: Toshiba Medical Systems Corporation (Canon Inc.)
• Original Assignee: Toshiba Medical Systems Corporation (Canon Inc.)
• Inventors: Kojima, Tsuyoshi, Kawano, Toshiaki, Saito, Yoshinori, Yumiza, Hisayasu, Takanaka, Makoto
• Primary Examiner(s): Ho, Allen C.
• Application Number:
  US14/633,465
• Publication Number:
  US 20150250442A1
• Time in Patent Office: 1,166 Days
• Field of Search: 378 91, 378196, 378197, 378205, 378209
• CPC Class Codes: A61B 6/0487 Motor-assisted positioning
• CPC Class Codes: A61B 6/4233 using matrix detectors
• CPC Class Codes: A61B 6/4441 the rigid structure being a C-arm or U-arm
• CPC Class Codes: A61B 6/4464 the source unit or the detector unit being mounted to ceiling
• CPC Class Codes: A61B 6/4476 related to motor-assisted motion of the source unit
• CPC Class Codes: A61B 6/487 involving fluoroscopy
• CPC Class Codes: A61B 6/545 involving automatic set-up of acquisition parameters
• CPC Class Codes: A61B 6/547 involving tracking of position of the device or parts of the device

Abstract

An X-ray image diagnostic apparatus is provided with an X-ray irradiation unit configured to perform irradiation with X-rays; a detection unit configured to detect the X-rays; a top table configured to be movable and allow a test object to be mounted; a position information acquisition unit configured to acquire first relative position information representing a relative position of the X-ray irradiation unit with respect to a position of the top table, and second relative position information representing a relative position of the detection unit with respect to the position of the top table, as clinical position information; and a drive control unit configured to drive the X-ray irradiation unit and the detection unit, based on displacement information representing a displacement of the position of the top table and the clinical position information.

Claims

1. An X-ray image diagnostic apparatus, comprising:

an X-ray source configured to perform irradiation with X-rays;

a radiation detector configured to detect the X-rays;

a top table configured to be movable and allow a test object to be mounted; and

processing circuitry configured to;

acquire first relative position information representing a relative position of the X-ray source with respect to a position of the top table and second relative position information representing a relative position of the radiation detector with respect to the position of the top table, as clinical position information, and

drive the X-ray source and the radiation detector, based on displacement information representing a displacement of the position of the top table and the clinical position information, and set a posture defined by a head position or a feet position of the test object,

wherein the processing circuitry is further configured to drive the X-ray source and the radiation detector based on set posture information representing the posture and the clinical position information.

2. The X-ray image diagnostic apparatus according to claim 1, further comprising

an arm configured to hold the X-ray source and the radiation detector, wherein

the processing circuitry is further configured to:

calculate a position of interest during irradiating the test object on the top table with the X-rays, based on at least one of position information on the X-ray source, angle information on the X-ray source, position information on the radiation detector, and angle information on the radiation detector, and

drive the arm so as to maintain a position relationship between a relative position of the X-ray source with respect to the position of interest and a relative position of the radiation detector with respect to the position of interest.

3. The X-ray image diagnostic apparatus according to claim 1, wherein the first relative position information, the second relative position information, and the position of the top table are represented in coordinates.

4. An X-ray image diagnostic apparatus comprising:

an X-ray source configured to perform irradiation with X-rays;

a radiation detector configured to detect the X-rays;

a top table configured to be movable and allow a test object to be mounted; and

processing circuitry configured to;

acquire first relative position information representing a relative position of the X-ray source with respect to a position of the top table, and second relative position information representing a relative position of the radiation detector with respect to the position of the top table, as clinical position information, and

drive the X-ray source and the radiation detector, based on displacement information representing a displacement of the position of the top table and the clinical position information, wherein

the displacement information representing the displacement in position of the top table is any of an amount of movement according to tilt of the position of the top table during taking an image of the test object, an amount of movement according to movement of the top table, and an amount of movement according to turning movement of the top table.

5. The X-ray image diagnostic apparatus according to claim 4, further comprising

an arm configured to hold the X-ray source and the radiation detector,

wherein the processing circuitry is further configured to:

calculate a position of interest during irradiating the test object on the top table with the X-rays, based on at least one of position information on the X-ray source, angle information on the X-ray source, position information on the radiation detector, and angle information on the radiation detector, and

drive the arm so as to maintain position relationship between a relative position of the X-ray source with respect to the position of interest and a relative position of the radiation detector with respect to the position of interest.

6. The X-ray image diagnostic apparatus according to claim 4, wherein the first relative position information, the second relative position information, and the position of the top table are represented in coordinates.

7. An X-ray image diagnostic apparatus, comprising:

an X-ray source configured to perform irradiation with X-rays;

a radiation detector configured to detect the X-rays;

a top table configured to be movable and allow a test object to be mounted; and

processing circuitry configured to;

acquire position information on the top table, acquire any of position information on the X-ray source, angle information on the X-ray source, position information on the radiation detector, and angle information on the radiation detector, and calculate a position of interest during irradiating the test object with the X-rays,

replace a center position in a coordinate system centered on the test object with the calculated position of interest, based on at least one of the position information on the X-ray source, the angle information on the X-ray source, the position information on the radiation detector, and the angle information on the radiation detector,

regard a displacement of the position information on the top table as a relative amount of movement from the replaced center position, and correct any of the position information on the X-ray source, the angle information on the X-ray source, the position information on the radiation detector, and the angle information on the radiation detector, and

drive the X-ray source and the radiation detector, based on the position information on the X-ray source, the angle information on the X-ray source, the position information on the radiation detector, and the angle information on the radiation detector which have been corrected.

8. The X-ray image diagnostic apparatus according to claim 7, wherein the displacement in position information on the top table is an amount of movement according to movement of the position of the top table or an amount of movement according to turning movement of the top table during taking an image of the test object.

9. The X-ray image diagnostic apparatus according to claim 7, wherein the displacement in position information on the top table is an amount of movement according to tilt of the position of the top table during taking an image of the test object.

10. The X-ray image diagnostic apparatus according to claim 7, further comprising

a bed that supports the top table, wherein

the processing circuitry is further configured to:

calculate a movement position of the bed, and

calculate the position information on the top table from the movement position of the bed.

11. The X-ray image diagnostic apparatus according to claim 7, wherein the processing circuitry is further configured to:

regard the displacement in the position information on the top table as the relative amount of movement from the replaced center position, and

correct any of the position information on the X-ray source, the angle information on the X-ray source, the position information on the radiation detector, and the angle information on the radiation detector, based on the position information on the X-ray source and the position information on the radiation detector, and a relative positional relationship with respect to the position information on the top table.

12. The X-ray image diagnostic apparatus according to claim 7, further comprising

a display device configured to display the center position in the coordinate system centered on the test object, wherein

the processing circuitry is further configured to:

cause the display device to display clinical angle coordinates based on the position information on the X-ray source, the angle information on the X-ray source, the position information on the radiation detector, and the angle information on the radiation detector, which have been corrected, every time when correcting any of the position information on the X-ray source, the angle information on the X-ray source, the position information on the radiation detector, and the angle information on the radiation detector, which are the relative amount of movement.