X-ray diagnostic apparatus

Patent metadata

Field	Value
Publication number	US-10893840-B2
Application number	US-201715802658-A
Country	US
Kind code	B2
Filing date	Nov 3, 2017
Priority date	Nov 8, 2016
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

According to one embodiment, an X-ray diagnostic apparatus includes a holding device and processing circuitry. The holding device movably holds an X-ray generator and an X-ray detector. The processing circuitry generates an X-ray image of the subject, based on an output of the X-ray detector. The processing circuitry sets an interference judgment region between the holding device and an interference object, based on a landmark in the X-ray image. The processing circuitry controls movement of the holding device, based on the set interference judgment region.

First claim

The invention claimed is:

1. An X-ray diagnostic apparatus comprising:
a holding device including an X-ray generator configured to generate X-rays which are emitted to a subject placed on a couch top, and an X-ray detector configured to detect X-rays which have passed through the subject, the holding device being configured to movably hold the X-ray generator and the X-ray detector; and
processing circuitry configured to
generate an X-ray image of the subject, based on an output of the X-ray detector,
detect, based on the generated X-ray image and a landmark image which is stored in a memory, a landmark from the X-ray image,
set an interference judgment region between the holding device and an interference object, based on the landmark detected from the X-ray image, and
control movement of the holding device, based on the set interference judgment region.

2. The X-ray diagnostic apparatus of claim 1 , wherein the landmark is a shape of a part of an instrument.

3. The X-ray diagnostic apparatus of claim 1 , wherein the memory is configured to associate and store the landmark image and a position and a size of a target corresponding to the landmark image, and
wherein the processing circuitry is configured:
to detect the landmark from the generated X-ray image by referring to the stored landmark image, and to specify the position and the size of the target corresponding to the detected landmark;
to derive a position and a size of the interference object including the target, the couch top and the subject, based on the specified position and size and a geometrical imaging condition of the X-ray image; and
to set the interference judgment region between the holding device which includes the X-ray generator and the X-ray detector, and the interference object, based on the derived position and size.

4. The X-ray diagnostic apparatus of claim 1 , a wherein the memory is configured to associate and store the landmark image and a position and a size of a target corresponding to the landmark image, and
wherein the memory is configured to further store an operation history indicating a locus of movement of the holding device, and
the processing circuitry is configured to update the interference judgment region in a manner to exclude a region corresponding to the locus, based on the operation history.

5. The X-ray diagnostic apparatus of claim 4 , wherein the processing circuitry is configured to change a movement speed in the interference judgment region, based on the operation history.

6. The X-ray diagnostic apparatus of claim 4 , wherein the processing circuitry configured to initialize the interference judgment in a manner to restore the excluded region, by using as a trigger a case in which a predetermined condition is satisfied.

7. The X-ray diagnostic apparatus of claim 4 , wherein the processing circuitry is configured to control the movement in a manner to lower a movement speed in the excluded region, when the interference judgment region is updated in accordance with an operation in which a distance between the holding device and the interference object becomes smaller.

8. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is an image of a magnetic pad.

9. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is an edge of an extension auxiliary couch top.

10. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is an edge of an arm rest.

11. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is a head fixing instrument.

12. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is a phantom.

13. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is a bone of a lower limb of the subject.

14. The X-ray diagnostic apparatus of claim 1 , wherein the landmark image stored in a memory is a bone of the head of the subject.

Assignees

• Toshiba Medical Sys Corp
• Canon Medical Systems Corp

Inventors

• Imagawa Kazuo
• Hayashi Yoshiyasu
• Ozawa Masahiro
• Fuchigami Ko

Classifications

• A61B6/4411

  the apparatus being modular (A61B6/4283 takes precedence) · CPC title

• A61B6/107

  Protection against radiation, e.g. shielding · CPC title

• A61B6/547

  involving tracking of position of the device or parts of the device · CPC title

• A61B6/06

  Diaphragms · CPC title

• A61K49/04

  X-ray contrast preparations · CPC title