A nuclear magnetic image guided radiotherapy equipment and storage medium

A nuclear magnetic image and nuclear magnetic technology, applied in the field of medical imaging, can solve problems such as wrong direction of movement, inability to use image guidance, and radiation from CT

Active Publication Date: 2021-04-20
BEIJING LINKING MEDICAL TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The current mature image guidance technology is CT image guidance technology, but because CT has radiation, it cannot be used for real-time image guidance and can only be used for positioning
However, if nuclear magnetic (MR) is used to guide radiation therapy, the existing technology can collect limited nuclear magnetic images; this is because at present, due to the influence of nuclear magnetic rotation speed, real-time full scanning cannot be achieved, and the obtained images are incomplete sliced ​​images , resulting in insufficient 3D reconstruction data
[0003] Publication number CN107206252A (invention name: motion management in nuclear magnetic resonance guided linear accelerator) discloses the principal component analysis method based on regression technology to predict the movement of tumors, but the natural defect of this method is that the factors of the principal components must be sufficient and reasonable, otherwise it is difficult Guarantees that the analyzed principal components are bogus, leading to wrong directions of predicted motion

Method used

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  • A nuclear magnetic image guided radiotherapy equipment and storage medium
  • A nuclear magnetic image guided radiotherapy equipment and storage medium
  • A nuclear magnetic image guided radiotherapy equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A method for nuclear magnetic image-guided radiotherapy, comprising the steps of:

[0051] (1) Acquisition of the first MRI image 210: the first MRI image of the patient is collected from multiple angle slice directions; preferably, when acquiring the first MRI image, at least two MRI images at different times are collected from a single angle slice, so as to capture the movement Maximum deviation of motion from multiple angles of the organ;

[0052] (2) Determine the placement and movement direction 220:

[0053] 2a. Perform three-dimensional reconstruction using the data collected by the first nuclear magnetic image, and reconstruct the two-dimensional patient nuclear magnetic image into a first 3D model 221;

[0054] 2b. Registration: register the first 3D model with the plan image, and calculate the registration position deviation and the maximum motion deviation 222; preferably, the registration is rigid registration or non-rigid registration; wherein, the plan im...

Embodiment approach 1

[0064] Implementation Mode 1: The radiotherapy plan is set in multiple irradiation stages according to the movement cycle of the moving organs, and the irradiation is carried out when the moving organs fall into the corresponding irradiation stage;

Embodiment approach 2

[0065] Embodiment 2: The head for beam irradiation is moved following the movement of the moving organ, preferably, the head is set on a mechanical arm controlled by a robot;

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Abstract

The invention belongs to the technical field of medical imaging, and relates to a nuclear magnetic image-guided radiotherapy method, equipment and a storage medium. The method comprises the following steps: (1) collecting the first nuclear magnetic image: collecting the first nuclear magnetic image of the patient from multiple angles; (2) determining the position and movement direction; (3) collecting the second nuclear magnetic image: (4 ) Establishing a mapping relationship: establishing a mapping relationship between the movement deviation of the nuclear magnetic monitoring direction and the radiotherapy plan; (5) implementing the radiotherapy plan. The nuclear magnetic image-guided radiotherapy method provided by the present invention can reproduce the movement of human organs by using a small amount of nuclear magnetic images; reduce the radiation to the human body when using CT image-guided technology; greatly reduce the imaging time, and can reproduce the movement of organs after the shooting is completed .

Description

technical field [0001] The invention belongs to the technical field of medical imaging, and relates to a nuclear magnetic image-guided radiotherapy method, equipment and a storage medium. Background technique [0002] During radiation therapy, due to the voluntary and involuntary movements of the human body, the patient's anatomical position and body position are often different from the positioning to varying degrees, which will lead to insufficient dose of the target area and / or excessive irradiation of normal tissues. The voluntary movement of the patient's body position can be reduced with the help of precise positioning system and strict fixation device. However, how to solve the uncertainty of the position of the target area caused by involuntary organ movement has always been a hot spot for oncologists and radiation physicists. The current mature image guidance technology is CT image guidance technology, but because CT has radiation, it cannot be used for real-time im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1049A61N2005/1055
Inventor 李贵
Owner BEIJING LINKING MEDICAL TECH CO LTD
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