X-ray diagnosis apparatus

Patent metadata

Field	Value
Publication number	US-11896409-B2
Application number	US-202117360239-A
Country	US
Kind code	B2
Filing date	Jun 28, 2021
Priority date	Jun 29, 2020
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

An X-ray diagnosis apparatus according to the embodiment disclosed herein includes an X-ray tube configured to have a plurality of focal points and configured to emit X-rays from each focal point, a radiation quality filter configured to change radiation quality of the X-rays emitted from each of the focal points, and a mover configured to move the radiation quality filter in a direction along which the focal points are aligned.

First claim

The invention claimed is:

1. An X-ray diagnosis apparatus comprising:
an X-ray tube configured to have a plurality of focal points and configured to emit X-rays from each focal point;
a radiation quality filter configured to change radiation quality of the X-rays emitted from each of the focal points; and
a mover configured to move the radiation quality filter in a direction along which the focal points are aligned,
wherein the radiation quality filter is configured to change the radiation quality by adjusting energy of photons of the X-rays emitted from each of the focal points when the X-rays pass through the radiation quality filter.

2. The X-ray diagnosis apparatus according to claim 1 , further comprising a controller configured to control the mover so as to position the radiation quality filter at a filter position corresponding to each of the focal points.

3. The X-ray diagnosis apparatus according to claim 1 , wherein the mover comprises:
a guider configured to guide the radiation quality filter in the direction along which the focal points are aligned; and
a support configured to support the radiation quality filter and configured to be moved while being guided by the guider.

4. The X-ray diagnosis apparatus according to claim 1 , wherein the radiation quality filter has an area corresponding to an irradiation field irradiated with the X-rays emitted from each of the focal points.

5. An X-ray diagnosis apparatus, comprising:
an X-ray tube configured to have a plurality of focal points and configured to emit X-rays from each focal point;
a radiation quality filter configured to change radiation quality of the X-rays emitted from each of the focal points;
a mover configured to move the radiation quality filter in a direction along which the focal points are aligned; and
a controller configured to control the mover so as to position the radiation quality filter at a filter position corresponding to each of the focal points, wherein
the radiation quality filter includes a plurality of sub-radiation quality filters each being formed of a different material; and
the mover moves the radiation quality filter including the sub-radiation quality filters.

6. The X-ray diagnosis apparatus according to claim 5 , wherein:
the controller controls the mover so that each of the sub-radiation quality filters is positioned at the filter position; and
when each of the sub-radiation quality filters are positioned at the filter position, the X-ray tube emits the X-rays from one of the focal points corresponding to the filter position, so that a plurality of X-ray images are formed with X-rays having different radiation qualities.

7. The X-ray diagnosis apparatus according to claim 5 , wherein the sub-radiation quality filters are joined together and moves together.

8. The X-ray diagnosis apparatus according to claim 5 , wherein the sub-radiation quality filters are separated from each other and move together while being separated.

9. The X-ray diagnosis apparatus according to claim 1 , wherein the X-ray diagnosis apparatus is one of a mammography, an X-ray apparatus capable of taking a tomosynthesis image, an X-ray apparatus capable of taking a long image, an X-ray TV and an X-ray apparatus for other general X-ray imaging.

10. The X-ray diagnosis apparatus according to claim 1 , wherein the focal points of the X-ray tube are arranged linearly or along an arc.

11. The X-ray diagnosis apparatus according to claim 1 , wherein, after X-ray images are taken by emitting the X-rays from the focal points, the X-ray tube is moved and then a new set of X-ray images are taken by emitting the X-rays from the focal points again.

12. The X-ray diagnosis apparatus according to claim 2 , wherein when the X-rays are emitted from one of the focal points, the controller controls the mover so that the radiation quality filter is stopped and positioned at the filter position corresponding to the one of the focal points.

13. The X-ray diagnosis apparatus according to claim 2 , wherein when the X-rays are emitted from one of the focal points, the controller controls the mover so that the radiation quality filter is not stopped but positioned at the filter position corresponding to the one of the focal points.

14. The X-ray diagnosis apparatus according to claim 1 , wherein the radiation quality filter is formed of at least one of molybdenum, rhodium, and silver.

Assignees

• Canon Medical Systems Corp

Inventors

• Kobayashi Yoshimasa
• Tomaru Takehito

Classifications

• A61B6/4035 Primary

  the source being combined with a filter or grating · CPC title

• A61B6/025 Primary

  Tomosynthesis · CPC title

• A61B6/4021

  involving movement of the focal spot · CPC title

• A61B6/502

  for diagnosis of breast, i.e. mammography · CPC title

• A61B6/00 Primary

  Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment (instruments measuring radiation intensity for application in the field of nuclear medicine, e.g. in vivo counting, G01T1/161) · CPC title