Physical model driven magnetic resonance four-dimensional dynamic imaging method and device

Through the magnetic resonance four-dimensional dynamic imaging method driven by the physical model, the target training model and the physical drive module are used to generate a high-fidelity four-dimensional dynamic imaging sequence, solving the problems of missing and incoherent information of the dynamic change process in the prior art, and achieving accurate evaluation of complex dynamic moving parts.

CN119535319APending Publication Date: 2025-02-28SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202411713880.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-27
Publication Date
2025-02-28

AI Technical Summary

Technical Problem

The existing four-dimensional magnetic resonance imaging technology has problems of missing information and incoherence when capturing the dynamic changes of complex dynamic moving parts, which is difficult to meet the clinical needs for accurate and complete dynamic image data.

Method used

The magnetic resonance four-dimensional dynamic imaging method driven by physical model is adopted. By acquiring magnetic resonance K-space data, three-dimensional static images are extracted, and dynamic changing modes are analyzed using the target training model, and future images are predicted based on this mode. Combined with the physical driving module to impose constraints in the K-space domain, the data is corrected to generate a high-fidelity four-dimensional dynamic imaging sequence.

Benefits of technology

This method can comprehensively capture the characteristics of different motion states at the imaging site, avoid inaccurate dynamic information, improve the accuracy of evaluating joint functions and lesions in complex dynamic motion areas, and provide more reliable image information.

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Abstract

The invention relates to the technical field of magnetic resonance imaging, and discloses a magnetic resonance four-dimensional dynamic imaging method and device driven by a physical model, and the method comprises the steps: obtaining the magnetic resonance K space data of a to-be-imaged part in a complete motion process; extracting a preset number of three-dimensional static images in the magnetic resonance K space data; analyzing the three-dimensional static image by using the target training model to obtain a dynamic change mode of the three-dimensional static image, and predicting a static image of a future time frame based on the dynamic change mode to obtain a four-dimensional image sequence; and applying physical constraint to the four-dimensional image sequence and correcting data in the K space domain by using a preset physical driving module, and carrying out multiple iterations to obtain a target four-dimensional dynamic imaging sequence. According to the method, high-resolution imaging of the prediction model is utilized, a small number of static images can generate the magnetic resonance four-dimensional dynamic sequence, and the problems that magnetic resonance imaging is limited in providing organ tissue dynamic motion information and complex dynamic motion joint functions and lesion conditions are difficult to comprehensively evaluate are solved.
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Citation Information

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