Using a rotating 2d x-ray imager as an imaging device to perform target tracking during radiation treatment delivery

Patent metadata

Field	Value
Publication number	US-2020375560-A1
Application number	US-202016994241-A
Country	US
Kind code	A1
Filing date	Aug 14, 2020
Priority date	Jan 6, 2017
Publication date	Dec 3, 2020
Grant date	—

Abstract

A method includes receiving, from a volumetric imager, a first image including a target of a patient. The method further includes receiving a second image including the target of the patient. The method further includes tracking, by a processing device, a position of the target using the first image and the second image by maintaining a fixed alignment between a treatment beam of a linear accelerator (LINAC) and a source and detector pair of the volumetric imager during operation of the LINAC.

First claim

What is claimed is:

1 . A method, comprising:
receiving, from a volumetric imager, a first image including a target of a patient; receiving a second image including the target of the patient; and tracking, by a processing device, a position of the target using the first image and the second image, wherein performing the tracking comprises: maintaining a fixed alignment between a treatment beam of a linear accelerator (LINAC) and a source and detector pair of the volumetric imager during operation of the LINAC.

2 . The method of claim 1 , wherein the first image is a three-dimensional (3D) intrafraction image, and wherein the 3D intrafraction image is one of: a kilovoltage computed tomography (kV-CT) image, a kilovoltage cone beam computed tomography (kV-CBCT) image, a megavoltage cone beam computed tomography (MV-CBCT) image, or a megavoltage computed tomography (MVCT) image.

3 . The method of claim 1 , wherein the first image is a three-dimensional (3D) intrafraction image, and wherein the 3D intrafraction image is a kilovoltage computed tomography (kV-CT) image.

4 . The method of claim 1 , wherein the second image is received from one of: the volumetric imager or a static x-ray imager.

5 . The method of claim 1 , wherein the fixed alignment is an orthogonal alignment.

6 . A radiation treatment delivery system comprising:
a volumetric imager to acquire a first image of a target within a patient; a linear accelerator (LINAC) to deliver a radiation treatment; and a processing device, operatively coupled with the volumetric imager and the LINAC, to:
receive, from the volumetric imager, the first image;
receive a second image including the target; and
track a position of the target using the first image and the second image; and
a static x-ray imager, wherein the second image is received from the static x-ray imager.

7 . The system of claim 6 , wherein the first image is a three-dimensional (3D) intrafraction image, and wherein the 3D intrafraction image is one of: a kilovoltage computed tomography (kV-CT) image, a kilovoltage cone beam computed tomography (kV-CBCT) image, a megavoltage cone beam computed tomography (MV-CBCT) image, or a megavoltage computed tomography (MVCT) image.

8 . The system of claim 6 , wherein the first image is a three-dimensional (3D) intrafraction image, and wherein the 3D intrafraction image a kilovoltage computed tomography (kV-CT) image.

9 . A non-transitory computer readable medium comprising instructions that, when executed by a processing device, cause the processing device to:
receive, from a volumetric imager, a first image including a target of a patient; receive a second image including the target of the patient; and track, by a processing device, a position of the target using the first image and the second image, wherein performing the tracking comprises: maintaining a fixed alignment between a treatment beam of a linear accelerator (LINAC) and a source and detector pair of the volumetric imager during operation of the LINAC.

10 . The non-transitory computer readable medium of claim 9 , wherein the first image is a three-dimensional (3D) intrafraction image, and wherein the 3D intrafraction image is one of: a kilovoltage computed tomography (kV-CT) image, a kilovoltage cone beam computed tomography (kV-CBCT) image, a megavoltage cone beam computed tomography (MV-CBCT) image, or a megavoltage computed tomography (MVCT) image.

11 . The non-transitory computer readable medium of claim 9 , wherein the first image is a three-dimensional (3D) intrafraction image, and wherein the 3D intrafraction image a kilovoltage computed tomography (kV-CT) image.

12 . The non-transitory computer readable medium of claim 9 , wherein the fixed alignment is an orthogonal alignment.

Assignees

• Accuray Inc

Inventors

• Naylor Michael P
• Core Matthew
• Jordan Petr
• Maurer Jr Calvin R

Classifications

• A61B6/102 Primary

  Protection against mechanical damage, e.g. anti-collision devices · CPC title

• A61B6/4266

  characterised by using a plurality of detector units (A61B6/4014 takes precedence) · CPC title

• A61N2005/1054

  using a portal imaging system · CPC title

• A61B6/4085

  Cone-beams · CPC title

• A61N5/1067

  in real time, i.e. during treatment · CPC title