X-RAY IMAGE DIAGNOSTIC APPARATUS

• US 20150250442A1
• Filed: 02/27/2015
• Published: 09/10/2015
• 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.), Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: KOJIMA, Tsuyoshi, KAWANO, Toshiaki, SAITO, Yoshinori, YUMIZA, Hisayasu, TAKANAKA, Makoto
• Granted Patent: US 9,962,139 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 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.

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

a posture setting unit configured to set a sleep posture defined by a head position or a feet position of the test object,

wherein the drive control unit drives the X-ray irradiation unit and the detection unit, based on set posture information on the posture of the test object and the clinical position information.

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

an arm configured to hold the X-ray irradiation unit and the detection unit; and

a calculation unit for a position of interest configured to calculate the position of interest during irradiating the test object on the top table with the X-rays, based on at least any of position information on the X-ray irradiation unit, angle information on the X-ray irradiation unit, position information on the detection unit, and angle information on the detection unit,

wherein the drive control unit drives the arm so as to maintain position relationship between a relative position of the X-ray irradiation unit with respect to the position of interest and a relative position of the detection unit with respect to the position of interest.

4. The X-ray image diagnostic apparatus according to claim 1,

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 1,

wherein the first relative position information, the second relative position information, and position information on the top table are represented in coordinates.

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

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 top table position information acquisition unit configured to acquire position information on the top table;

a calculation unit for a position of interest configured to acquire any of position information on the X-ray irradiation unit, angle information on the X-ray irradiation unit, position information on the detection unit, and angle information on the detection unit, and calculate the position of interest during irradiating the test object with the X-rays;

a center coordinate conversion unit configured to replace a center position in a coordinate system centered on the test object with the calculated position of interest, based on at least any of the position information on the X-ray irradiation unit, the angle information on the X-ray irradiation unit, the position information on the detection unit and the angle information on the detection unit;

an information correction unit configured to 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 position information on the X-ray irradiation unit, angle information on the X-ray irradiation unit, position information on the detection unit, and angle information on the detection unit; and

a drive control unit configured to drive the X-ray irradiation unit and the detection unit, based on the position information on the X-ray irradiation unit, the angle information on the X-ray irradiation unit, the position information on the detection unit, and angle information on the detection unit which have been corrected.

7. The X-ray image diagnostic apparatus according to claim 6,

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.

8. The X-ray image diagnostic apparatus according to claim 6,

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.

9. The X-ray image diagnostic apparatus according to claim 6, further comprising:

a top table position information calculation unit configured to calculate a movement position of a bed supporting the top table, and calculate, the position information on the top table from a movement position of the bed.

10. The X-ray image diagnostic apparatus according to claim 6,

wherein the information correction unit regards a displacement in the position information on the top table as a relative amount of movement from the replaced center position, and corrects any of position information on the X-ray irradiation unit, angle information on the X-ray irradiation unit, position information on the detection unit, and angle information on the detection unit, based on the position information on the X-ray irradiation unit and the detection unit, and a relative positional relationship with respect to the position information on the top table.

11. The X-ray image diagnostic apparatus according to claim 6, further comprising:

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

wherein the information correction unit causes the display device to display clinical angle coordinates based on the position information on the X-ray irradiation unit, the angle information on the X-ray irradiation unit, the position information on the detection unit, and angle information on the detection unit which have been corrected, every time when correcting any of the position information on the X-ray irradiation unit, the angle information on the X-ray irradiation unit, the position information on the detection unit, and the angle information on the detection unit which are the relative amount of movement.