Method for tracking movement of target in body by adopting magnetic resonance imaging

A magnetic resonance imaging and target technology, applied in X-ray/γ-ray/particle irradiation therapy, etc., can solve the problems of low tracking accuracy and inability to detect targets

Inactive Publication Date: 2018-03-20
张坤 +1
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Problems solved by technology

The disadvantages of this method are also the low tracking ac

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  • Method for tracking movement of target in body by adopting magnetic resonance imaging
  • Method for tracking movement of target in body by adopting magnetic resonance imaging
  • Method for tracking movement of target in body by adopting magnetic resonance imaging

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Embodiment Construction

[0028] In the flow process of the present invention ( figure 1 ), step 101 requires three-dimensional imaging of the region of interest where the target is located. One embodiment uses magnetic resonance imaging. Set the parameters of the MRI scan so that the resulting image has a higher spatial resolution. At the same time, respiratory gating or ECG gating is used during scanning to suppress artifacts caused by physiological movements.

[0029] In the case that the deformation of the target itself can be ignored (that is, the target is regarded as a rigid body), 3D imaging only needs to be imaged once in one physiological motion cycle of the patient, and finally a 3D model of the target is obtained.

[0030] In the case where the deformation of the target itself needs to be considered, 3D imaging needs to be repeated multiple times within a physiological movement cycle of the patient, and then image segmentation is performed to obtain multiple 3D models of the target at dif...

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Abstract

The invention relates to a method for tracking the movement of a target in the body by adopting magnetic resonance imaging. The method can be applied to radiotherapy equipment guided by magnetic resonance imaging. The method comprises a process (figure 1) of realizing tracking for the movement of the target in the body, a process (figure 5) of performing similarity comparison on a real-time imageand a texture atlas and methods applied in the two processes, wherein the methods comprise a method (102) of segmenting a target three-dimensional model from an image, a method of calculating a center(3) of a three-dimensional target (2), a method (103) of building a target fault texture atlas, a method (104) of performing real-time imaging on a region of interest and a method (105) of performingsimilarity comparison on a real-time image and the texture atlas.

Description

technical field [0001] The invention relates to a method for tracking the movement of an object in the body, which can be applied to radiotherapy equipment guided by magnetic resonance imaging. Background technique [0002] In three-dimensional space, the movement of an object (rigid body) has six degrees of freedom, namely, vertical movement, left and right movement, forward and backward movement, swooping rotation, circling rotation and roll rotation. [0003] In research, the complex motion of an object is often viewed as a combination of motions in several degrees of freedom. Tracking the target's motion in three-dimensional space can also be simplified as tracking its motion in six degrees of freedom. [0004] Tracking the movement of targets in the body is of great significance in precise radiation therapy. [0005] Currently, a radiotherapy device using magnetic resonance imaging for real-time guidance (MRI-Linac) is under development. The research and use of MRI-L...

Claims

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Application Information

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IPC IPC(8): A61N5/10
Inventor 张坤
Owner 张坤
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