US 11,684,803 B2 · Positioning method and apparatus, and radiation therapy system

Abstract

Embodiments of the present disclosure provide a positioning method and apparatus, and a radiation therapy system. The positioning method comprises: acquiring a current gamma angle before radiation beams of a radiation source illuminate a treatment body part; acquiring a reconstructed image corresponding to the current gamma angle, the reconstructed image being an image reconstructed according to an image of the treatment body part acquired in advance; acquiring an IGRT image of the treatment body part corresponding to the current gamma angle, the IGRT image being an image generated by an image guide system; and comparing the reconstructed image with the IGRT image to obtain a deviation of the position of the treatment body part, and sending out the deviation, so that the position of the treatment body part is adjusted according to the deviation when the deviation is greater than a preset threshold.

Claims20

Dependent claims

A positioning method, comprising:

acquiring a current gamma angle before radiation beams of a radiation source irradiate a treatment body part of a patient, the gamma angle being an angle between a vertical plane and a supporting plane of a fixing structure for supporting the treatment body part of the patient, and the current gamma angle being less than 90° or greater than 90°;
acquiring a reconstructed image corresponding to the current gamma angle, the reconstructed image being an image reconstructed according to an image of the treatment body part acquired in advance with the gamma angle being 90°;
acquiring an image guide radiation therapy (IGRT) image of the treatment body part with the treatment body part being supported by the supporting plane at the current gamma angle, wherein the IGRT image is an image generated by an image guide system;
and
comparing the reconstructed image with the IGRT image to obtain a deviation of a position of the treatment body part so that the position of the treatment body is adjusted according to the deviation when the deviation is greater than a preset threshold.

2 more elements

A positioning method, comprising:

receiving a deviation of a position of a treatment body part of a patient sent by an image guide system, the deviation being obtained by comparing a reconstructed image corresponding to a current gamma angle with an image guide radiation therapy (IGRT) image of the treatment body part corresponding to the current gamma angle after the reconstructed image and the IGRT image are acquired by the image guide system, wherein the gamma angle is an angle between a vertical plane and a supporting plane of a fixing structure for supporting the treatment body part, the IGRT image of the treatment body part is acquired with the treatment body part of the patient being supported by the supporting plane at the current gamma angle, the current gamma angle is less than 90° or greater than 90°, and the reconstructed image is an image reconstructed according to an image of the treatment body part acquired in advance with the gamma angle being 90°;
and
adjusting the position of the treatment body part according to the deviation when the deviation is greater than a preset threshold.

An image guide system, comprising a processor and a memory, wherein the memory is configured to store instructions executed by the processor, and the processor is configured to perform operations of:

acquiring a current gamma angle before radiation beams of radiation source irradiate a treatment body part of a patient, wherein the gamma angle is an angle between a vertical plane and a supporting plane of a fixing structure for supporting the treatment body part, and the current gamma angle is less than 90° or greater than 90°;
acquiring a reconstructed image corresponding to the current gamma angle, the reconstructed image being an image reconstructed according to an image of the treatment body part acquired in advance with the gamma angle being 90°;
acquiring an IGRT image of the treatment body part with the treatment body part being supported by the supporting plane at the current gamma angle, the IGRT image being an image generated by the image guide system;
and
comparing the reconstructed image with the IGRT image to obtain a deviation of a position of the treatment body part so that the position of the treatment body part is adjusted according to the deviation when the deviation is greater than a preset threshold.

2 more elements

A computer, the computer comprising a processor and a memory, wherein the memory is configured to store instructions executed by the processor, and the processor is configured to perform operations of:

receiving a deviation of a position of a treatment body part of a patient sent by an image guide system of a radiation therapy system, the deviation being obtained by comparing a reconstructed image corresponding to a current gamma angle with an IGRT image corresponding to the current gamma angle after the reconstructed image and the IGRT image are acquired by the image guide system, wherein the gamma angle is an angle between a vertical plane and a supporting plane of a fixing structure for supporting the treatment body part, the IGRT image of the treatment body part is acquired with the treatment body part of the patient being supported by the supporting plane at the current gamma angle, the current gamma angle is less than 90° or greater than 90° and the reconstructed image is an image reconstructed according to an image of the treatment body part acquired in advance with the gamma angle being 90°;
and
adjusting the position of the treatment body part according to the deviation when the deviation is greater than a preset threshold.

Dependencies are inferred from the claim text.

Positioning method and apparatus, and radiation therapy system

Life of this patent

Positioning method and apparatus, and radiation therapy system

Life of this patent

Abstract

Claims20