X-ray imaging system for radiation therapy

Patent metadata

Field	Value
Publication number	US-11951333-B2
Application number	US-202318180818-A
Country	US
Kind code	B2
Filing date	Mar 8, 2023
Priority date	Sep 8, 2020
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A radiation system may include a treatment head configured to deliver a treatment beam to an object, a first assistance assembly configured to facilitate a delivery of the treatment beam, a first imaging radiation source configured to direct a first imaging beam toward the object, a first detector configured to detect at least a portion of the first imaging beam, and a second assistance assembly configured to facilitate a delivery of the first imaging beam. The gantry may include a first gantry portion having a rotation axis and a second gantry portion located next to the first gantry portion along the rotation axis. The treatment head, the first imaging radiation source, and the first detector may be disposed on the first gantry portion. The first assistance assembly and the second assistance assembly may be housed within the second gantry portion.

First claim

What is claimed is:

1. A system comprising:
a treatment assembly including a treatment head configured to deliver a treatment beam to an object and a first assistance assembly configured to facilitate a delivery of the treatment beam;
an imaging assembly including a first imaging radiation source configured to direct a first imaging beam toward the object, a first detector configured to detect at least a portion of the first imaging beam, and a second assistance assembly configured to facilitate a delivery of the first imaging beam;
a gantry including a first gantry portion and a second gantry portion,
the treatment head, the first imaging radiation source, and the first detector being disposed on the first gantry portion that has a rotation axis; and

the second gantry portion being located next to the first gantry portion along the rotation axis, the first assistance assembly and the second assistance assembly being housed within the second gantry portion.

2. The system of claim 1 , wherein the treatment head, the first imaging radiation source, and the first detector are configured to rotate in a same rotation plane that is perpendicular to the rotation axis.

3. The system of claim 1 , wherein
the treatment head is configured to rotate in a first rotation plane perpendicular to the rotation axis,
the first imaging radiation source and the first detector are configured to rotate in a second rotation plane that is perpendicular to the rotation axis, and
the first rotation plane is different from the second rotation plane.

4. The system of claim 3 , wherein the first imaging radiation source and the first detector are located between the second gantry portion and the treatment head.

5. The system of claim 1 , wherein the first imaging radiation source is located as close as possible to the treatment head without interference with the treatment beam.

6. The system of claim 1 , wherein the delivery of the treatment beam and the delivery of the first imaging beam alternate.

7. The system of claim 6 , wherein
the first gantry portion rotates at a first speed when the first imaging beam is delivered,
the first gantry portion rotates at a second speed when the treatment beam is delivered, and
the first speed is faster than the second speed.

8. The system of claim 1 , wherein the delivery of the treatment beam and the delivery of the first imaging beam are concurrent, the first imaging radiation source, the first detector, and the treatment head rotate at a third speed when the first imaging beam and the treatment beam are delivered.

9. The system of claim 1 , wherein there is an angular offset between the first imaging radiation source and the treatment head.

10. The system of claim 1 , wherein the imaging assembly includes
at least one second imaging radiation source each of which is configured to emit a second imaging beam towards the object,
at least one second detector configured to detect at least a portion of the at least one second imaging beam, and
the at least one second imaging radiation source and the at least one second detector are mounted on the first gantry portion.

11. The system of claim 10 , wherein at least one of the at least one second imaging radiation source and the treatment head are configured to rotate in a same rotation plane perpendicular to the rotation axis.

12. The system of claim 10 , wherein at least one of the at least one second imaging radiation source and the treatment head are configured to rotate in different rotation planes each of which is perpendicular to the rotation axis.

13. A method comprising:
causing an object to be positioned in a radiation system, the radiation system including:
a treatment assembly including a treatment head and a first assistance assembly configured to facilitate a delivery of a treatment beam from the treatment head;
an imaging assembly including an imaging radiation source, a detector, and a second assistance assembly configured to facilitate a delivery of an imaging beam from the imaging radiation source; and
a gantry including a first gantry portion and a second gantry portion,
the first gantry portion having a rotation axis, the treatment head, the imaging radiation source, and the detector being mounted on the first gantry portion; and
the second gantry portion being located next to the first gantry portion along the rotation axis, the first assistance assembly and the second assistance assembly being housed within the second gantry portion;

causing the imaging radiation source to deliver an imaging beam to the object;
obtaining an imaging dataset corresponding to at least a portion of the imaging beam detected by the detector; and
causing the treatment head to deliver a treatment beam to the object.

14. The method of claim 13 , further comprising:
generating, based on the imaging dataset, an image associated with the object, wherein the treatment beam is delivered to the object based further on the image.

15. The method of claim 14 , the delivering of the treatment beam to the object further comprising:
adjusting a treatment plan based on the image; and
delivering, from the treatment head and based on the adjusted treatment plan, an adjusted treatment beam to the object.

16. The method of claim 14 , the causing the treatment head to deliver a treatment beam to the object further comprising:
adjusting a treatment plan based on the image; and
causing the treatment head to pause the delivery of the treatment beam.

17. The method of claim 14 , further comprising:
determining whether an unpredicted motion of the object exists based on the image; and
in response to determining that the unpredicted motion of the object exists, causing the treatment head to pause the delivery of the treatment beam.

18. The method of claim 14 , further comprising:
determining whether the object has ceased a planned breathhold based on the image; and
in response to determining that the object has ceased the planned breathhold, causing the treatment head to pause the delivery of the treatment beam.

19. A system comprising:
a treatment assembly including a treatment head configured to deliver a treatment beam to an object and a first assistance assembly configured to facilitate a delivery of the treatment beam;
an imaging assembly including a first imaging radiation source configured to direct a first imaging beam toward the object, a first detector configured to detect at least a portion of the first imaging beam, and a second assistance assembly configured to facilitate a delivery of the first imaging beam;
a gantry having a rotation axis and supporting the treatment assembly and the imaging assembly,
the treatment head, the first imaging radiation source, and the first detector being disposed on a same side, along the rotation axis, of the first assistance assembly and the second assistance assembly.

20. The system of claim 19 , wherein
the first imaging radiation source is positioned apart from the treatment head by a certain distance along the rotation axis such that the first imaging radiation source delivers the first imaging beam to image a first region of the object while the treatment head is delivering the treatment beam towards a second region of the object;
the first region relates to a motion of the second region; or
the motion of the second region is determined based on an image of the first region.

Assignees

• Shanghai United Imaging Healthcare Co Ltd

Inventors

• Maltz Jonathan
• Ni Cheng

Classifications

• A61N5/1081 Primary

  Rotating beam systems with a specific mechanical construction, e.g. gantries · CPC title

• A61B6/4014 Primary

  arranged in multiple source-detector units · CPC title

• A61B6/4435

  the source unit and the detector unit being coupled by a rigid structure · CPC title

• A61N5/1037

  taking into account the movement of the target, e.g. 4D-image based planning · CPC title

• A61N5/1039

  using functional images, e.g. PET or MRI · CPC title