X-ray imaging system for radiation therapy

Patent metadata

Field	Value
Publication number	US-12544597-B2
Application number	US-202418629916-A
Country	US
Kind code	B2
Filing date	Apr 8, 2024
Priority date	Sep 8, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

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; an imaging assembly including an imaging radiation source configured to direct an imaging beam toward the object and a detector configured to detect at least a portion of the imaging beam; and a gantry having a rotation axis and supporting the treatment assembly and the imaging assembly; wherein the imaging radiation source is positioned apart from the treatment head by a certain distance along the rotation axis such that the imaging radiation source delivers the 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, and the first region is different from the second region, wherein the imaging radiation source delivers the imaging beam to the first region of the object to image a motion of the object, wherein the treatment assembly further includes a collimator, the collimator including a plurality of leaves forming an aperture that is configured to collimate the treatment beam to conform to the second region, when the second region is moved relative to the treatment head, at least one of a position or a shape of the aperture of the collimator is adjusted such that the collimated treatment beam tracks the second region, when the second region is moved along the rotation axis relative to the treatment head by a first distance, the position of the aperture moves along a same direction with the second region by a second distance that is shorter than the first distance.

2 . The system of claim 1 , wherein the first region relates to a motion of the second region.

3 . The system of claim 2 , wherein the motion of the second region is determined based on an image of the first region.

4 . The system of claim 2 , wherein the first region includes at least one of heart, lung, diaphragm, bladder, or rectum of the object, and the second region includes at least one of chest, breast, or abdomen of the object.

5 . The system of claim 1 , wherein the first region partially overlaps the second region.

6 . The system of claim 1 , wherein the first region does not overlap the second region.

7 . The system of claim 1 , wherein the position or the shape of the aperture is adjusted by at least one of:
moving the whole collimator along the rotation axis, adjusting one or more leaves of the plurality of leaves of the collimator that are involved in forming the aperture, or rotating the collimator by a certain degree.

8 . A non-transitory computer readable medium, comprising at least one set of instructions, wherein when executed by one or more processors of a computing device, the at least one set of instructions causes the computing device to perform a method, the method comprising:
causing an object to be positioned in a radiation system, the radiation system including:
a treatment assembly including a treatment head configured to deliver a treatment beam to an object;
an imaging assembly including an imaging radiation source configured to direct an imaging beam toward the object and a detector configured to detect at least a portion of the imaging beam; and
a gantry having a rotation axis and supporting the treatment assembly and the imaging assembly;
wherein the imaging radiation source is positioned apart from the treatment head by a certain distance along the rotation axis; and
causing the imaging radiation source to deliver the imaging beam to 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 being different from the second region, wherein the imaging radiation source delivers the imaging beam to the first region of the object to image a motion of the object, wherein the treatment assembly further includes a collimator, the collimator including a plurality of leaves forming an aperture that is configured to collimate the treatment beam to conform to the second region, when the second region is moved relative to the treatment head, at least one of a position or a shape of the aperture of the collimator is adjusted such that the collimated treatment beam tracks the second region, when the second region is moved along the rotation axis relative to the treatment head by a first distance, the position of the aperture moves along a same direction with the second region by a second distance that is shorter than the first distance.

9 . A method comprising:
causing an object to be positioned in a radiation system, the radiation system including:
a treatment assembly including a treatment head configured to deliver a treatment beam to an object;
an imaging assembly including an imaging radiation source configured to direct an imaging beam toward the object and a detector configured to detect at least a portion of the imaging beam; and
a gantry having a rotation axis and supporting the treatment assembly and the imaging assembly;
wherein the imaging radiation source is positioned apart from the treatment head by a certain distance along the rotation axis; and
causing the imaging radiation source to deliver the imaging beam to 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 being different from the second region, wherein the imaging radiation source delivers the imaging beam to the first region of the object to image a motion of the object, wherein the treatment assembly further includes a collimator, the collimator including a plurality of leaves forming an aperture that is configured to collimate the treatment beam to conform to the second region, when the second region is moved relative to the treatment head, at least one of a position or a shape of the aperture of the collimator is adjusted such that the collimated treatment beam tracks the second region, when the second region is moved along the rotation axis relative to the treatment head by a first distance, the position of the aperture moves along a same direction with the second region by a second distance that is shorter than the first distance.

10 . The method of claim 9 , wherein the first region relates to a motion of the second region, and the motion of the second region is determined based on an image of the first region.

11 . The method of claim 10 , wherein the first region includes at least one of heart, lung, diaphragm, bladder, or rectum of the object, and the second region includes at least one of chest, breast, or abdomen of the object.

12 . The method of claim 9 , wherein
the first region partially overlaps the second region, or the first region does not overlap the second region.

13 . The system of claim 1 , wherein the motion of the object is a respiratory motion.

14 . The system of claim 9 , wherein the motion of the object is a respiratory motion and the method further includes:
determining whether the object has ceased a planned breathhold based on the imaging of the respiratory motion of the object; 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.

Assignees

• Shanghai United Imaging Healthcare Co Ltd

Inventors

• Maltz Jonathan
• Ni Cheng

Classifications

• A61B6/4014 Primary

  arranged in multiple source-detector units · CPC title

• A61N5/1039

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

• A61N5/1037

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

• A61B6/4435

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

• A61N5/103

  Treatment planning systems · CPC title