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Flow velocity measurement method and device based on 4D Flow MRI, computer and storage medium

A technology of flow velocity measurement and flow velocity information, which is applied in the field of flow velocity measurement based on 4DFlowMRI, can solve the problems of cumbersome and inconvenient operation, small range, and large operation volume, so as to increase repeatability and consistency, reduce operation workload, and reduce The effect of operational difficulty

Pending Publication Date: 2021-11-30
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2) The 4D Flow MRI method is a non-invasive nuclear magnetic resonance examination, while the three-dimensional image models used in the CFD method are currently mostly derived from invasive DSA examinations. DSA examinations not only require a large dose of X-ray radiation, but also exist Serious complications such as cerebral infarction and cerebral hemorrhage may
Overall, the operation is more cumbersome and inconvenient
[0006] 2) After the Relice layer is selected, it is necessary to further draw the outline of the target on the Reslice layer, which requires a large amount of operation
[0007] 3) The Reslice layer only covers a certain cross-section of the target blood vessel, and the range is small, so that the measured results are highly dependent on the section where the Reslice layer is located, and the repeatability of the measurement results for blood vessels with large curvature is poor

Method used

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  • Flow velocity measurement method and device based on 4D Flow MRI, computer and storage medium
  • Flow velocity measurement method and device based on 4D Flow MRI, computer and storage medium
  • Flow velocity measurement method and device based on 4D Flow MRI, computer and storage medium

Examples

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Effect test

Embodiment 1

[0052] In this example, if figure 1 As shown, a flow velocity measurement method based on 4D Flow MRI is provided, which includes:

[0053] Step 110, based on the 4D Flow MRI, the flow velocity of the blood vessel is measured, and the three-dimensional image and three-dimensional velocity flow field data of the blood vessel are obtained.

[0054] Specifically, 4D Flow MRI technology is used to measure the flow velocity of blood vessels and construct a three-dimensional image based on blood vessels to obtain three-dimensional images of blood vessels and three-dimensional velocity flow field data.

[0055] In step 120, a region of interest is selected from the three-dimensional image of the blood vessel according to preset rules to obtain the region of interest of the target blood vessel.

[0056] In this embodiment, the region of interest is extracted from the calculated and constructed three-dimensional image of the blood vessel by using preset rules, and the region of intere...

Embodiment 2

[0080] In this example, see Figure 4 , first complete the flow velocity measurement based on 4D Flow MRI, obtain the three-dimensional velocity flow field data of the blood vessel, and then preprocess the three-dimensional velocity flow field data, and then select the ROI (region of interest) according to the measurement position of the target blood vessel in the three-dimensional space, region of interest), and finally automatically calculate the velocity information of the voxels covered by the ROI according to the selected ROI.

[0081] Among them, the preprocessing of the three-dimensional velocity flow field data:

[0082]During the acquisition process of 4D Flow MRI data, the image quality will be affected by phase shift difference caused by noise and eddy current, so data preprocessing is required to remove noise and phase shift. The preprocessing steps of 4D Flow MRI data include: background noise removal, eddy current correction, and vessel segmentation. After the ...

Embodiment 3

[0095] In this example, if figure 2 As shown, a flow velocity measurement device based on 4D Flow MRI is provided, including:

[0096] The flow field data acquisition module 210 is used to measure the flow velocity of blood vessels based on 4D Flow MRI, and obtain three-dimensional images of blood vessels and three-dimensional velocity flow field data;

[0097] A region of interest acquisition module 220, configured to select a region of interest from a three-dimensional image of a blood vessel according to a preset rule, and obtain a region of interest of a target blood vessel;

[0098] The flow velocity information extraction module 230 is configured to extract flow velocity information in the region of interest of the target blood vessel according to the three-dimensional velocity flow field data of the blood vessel.

[0099] In one embodiment, the ROI acquisition module includes:

[0100] The regular polyhedron three-dimensional space acquisition unit is used to acquire...

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Abstract

The invention provides a flow velocity measurement method and device based on 4D Flow MRI, a computer and a storage medium, and the method comprises the steps: carrying out the flow velocity measurement of a blood vessel based on 4D Flow MRI, and obtaining a three-dimensional image and three-dimensional velocity flow field data of the blood vessel; selecting a region of interest for the three-dimensional image of the blood vessel according to a preset rule to obtain a region of interest of a target blood vessel; and according to the three-dimensional velocity flow field data of the blood vessel, extracting flow velocity information in the region of interest of the target blood vessel. The target blood vessel is directly subjected to region-of-interest selection in the three-dimensional space, acquisition of a Reslice layer and manual sketching of the region-of-interest of the target blood vessel are not needed, the operation difficulty is reduced, and the operation workload is reduced.

Description

technical field [0001] The present invention relates to the technical field of flow velocity measurement based on magnetic resonance imaging, in particular to a flow velocity measurement method, device, computer and storage medium based on 4D FlowMRI. Background technique [0002] The continuous development of MR (Magnetic Resonance, magnetic resonance) equipment and technology has significantly improved the spatial resolution and soft tissue resolution of magnetic resonance imaging. With the improvement of the performance of radiofrequency and gradient systems in magnetic resonance imaging systems and the continuous improvement and application of retrospective ECG gating and respiratory navigation technology, a system that can provide time-varying flow velocity information in three directions in three-dimensional space The three-dimensional dynamic phase contrast imaging method has gradually developed and matured, and this imaging method is also called 4D Flow MRI. In rece...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/11G06K9/32
CPCG06T7/0002G06T7/11G06T7/0012G06T2207/10088G06T2207/30104
Inventor 李睿付明珠陈硕
Owner TSINGHUA UNIV
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