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Dynamic three-dimensional reconstruction method and system for hepatectomy

A technology for three-dimensional reconstruction and hepatectomy, applied in the field of three-dimensional reconstruction, can solve the problems of high technical time complexity, inability to perform dynamic monitoring of local areas, and high computing power requirements, so as to improve computing efficiency, reduce computing amount, and save computing power. Effect

Pending Publication Date: 2022-01-04
FUDAN UNIV
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a dynamic three-dimensional reconstruction method and system for liver resection in order to overcome the above-mentioned defects in the prior art. Grid processing, using the preoperative patient's precise three-dimensional surface model of the liver tissue as a reference, with the assistance of intraoperative CT, automatically locates the operating area of ​​the doctor's operation, and performs a high-level analysis of the different deformation surfaces of the liver tissue caused by various processing methods. The rapid reconstruction of the resolution solves the problems of high time complexity, high computing power requirements, and the inability to perform dynamic monitoring of local areas in the existing technology, and realizes the rapid reconstruction of the liver tissue surface in the surgical area during the operation, achieving dynamic monitoring during the operation and the purpose of assisting precise resection

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  • Dynamic three-dimensional reconstruction method and system for hepatectomy
  • Dynamic three-dimensional reconstruction method and system for hepatectomy
  • Dynamic three-dimensional reconstruction method and system for hepatectomy

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Embodiment 1

[0078] A dynamic 3D reconstruction method for liver resection, such as figure 1 shown, including the following steps:

[0079] 1) Obtain a preoperative CT image, perform grid processing on the contour data of the whole liver tissue in the preoperative CT image, and obtain initial grid data;

[0080] Three-dimensional reconstruction of the whole liver tissue (including each liver segment, hepatic vein, portal vein and biliary system, tumor lesions, etc.) was carried out by enhanced CT before operation, and the outline data of all levels of tissue in the whole liver tissue were transformed into different colors. Identify the initial point cloud data P; use the Delaunay triangulation algorithm to triangulate the initial point cloud data corresponding to organizations at all levels, and obtain the high-resolution triangulated initial grid data of organizations at all levels; where, the i-th level The initial point cloud data of the organization is:

[0081]

[0082] N i The ...

Embodiment 2

[0102] A dynamic 3D reconstruction system for liver resection, such as figure 2 shown, including:

[0103] ①The preoperative model grid processing module is used to obtain preoperative CT images, and perform grid processing on the contour data of the whole liver tissue in the preoperative CT images to obtain initial grid data;

[0104] Specifically, three-dimensional reconstruction of the whole liver tissue (including each liver segment, hepatic vein, portal vein and bile duct system, tumor lesions, etc.) is carried out with enhanced CT before operation, and the outline data of all levels of tissue in the whole liver tissue are transformed into The initial point cloud data P with different color identification; use the Delaunay triangulation algorithm to triangulate the initial point cloud data corresponding to organizations at all levels, and obtain the high-resolution triangulated initial grid data of organizations at all levels; among them, The initial point cloud data of...

Embodiment 3

[0130] This embodiment takes a dynamic three-dimensional reconstruction method of liver vascular system for liver resection as the implementation background, and the flow chart is as follows image 3 As shown, it is applicable to the situation of performing three-dimensional reconstruction under the preoperative traditional CT / helical CT / cone beam CT model, and this method can be implemented by the dynamic three-dimensional reconstruction system provided by this application, which can be implemented by software and / or hardware Realization can be integrated in devices such as computers, and specifically includes the following steps:

[0131] S1. Acquire preoperative high-precision CT images, perform grid processing on the outline data of the vascular system in the liver region, obtain high-resolution initial grid data, and classify various blood vessels;

[0132] Among them, when CT scans, all the voxel information of the scanning area can be obtained, but the voxel size select...

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Abstract

The invention relates to a dynamic three-dimensional reconstruction method and system for hepatectomy. The dynamic three-dimensional reconstruction method comprises the following steps of obtaining initial grid data based on a preoperative CT (Computed Tomography) image; obtaining a two-dimensional projection image of an operation area by using intraoperative CT to obtain target grid data; constructing curved surface models by using the target grid data and the initial grid data, performing rigid registration, and delimiting a model curved surface part with a relatively large deformation area to be divided into a to-be-reconstructed space; performing non-rigid deformation on the initial grid area in the to-be-reconstructed space, and reconstructing a high-resolution curved surface model of the to-be-reconstructed space; and replacing a corresponding part of a preoperative total liver tissue precise three-dimensional curved surface model with the generated high-resolution curved surface model of the to-be-reconstructed space. Compared with the prior art, the method is advantaged in that problems of high time complexity, high computing power requirement and incapability of dynamically monitoring a local area in the prior art are solved, a curved surface of the liver tissue in the operation area is quickly reconstructed in the operation, and purposes of dynamically monitoring and assisting in precise excision in the operation process are achieved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional reconstruction, in particular to a dynamic three-dimensional reconstruction method and system for liver resection. Background technique [0002] Through 3D reconstruction technology, CT / MRI and other medical images can be used to establish a clear 3D model of the whole liver tissue, and further visualize the cancer focus in the liver tissue of cancer patients. Before liver resection for patients with primary liver cancer, 3D reconstruction technology can be used to help doctors delineate the optimal surgical boundary, so as to achieve the goal of resecting the lesion along the path with the least damage and the greatest benefit during the operation. [0003] However, in liver resection, on the one hand, various treatment methods will cause different deformations of the liver tissue, making it difficult to accurately control the optimal surgical resection boundary. The current 3D reconst...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T19/00
CPCG06T17/00G06T19/003G06T2210/41
Inventor 张立华邝昊鹏杨鼎康王顺利杨仲伟
Owner FUDAN UNIV
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