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Method for freely browsing VB and marking method and system

A marking and free technology, applied in the field of medical devices, can solve problems such as difficult to judge angles, infeasibility, and too many branches, and achieve the effect of speeding up and simplifying operations

Active Publication Date: 2021-11-09
SHANGHAI CHEST HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the bronchi below the third degree, due to too many branches, the angle is more difficult to judge, and it is not feasible to name and mark the bronchi by the traditional method

Method used

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  • Method for freely browsing VB and marking method and system
  • Method for freely browsing VB and marking method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] Embodiment 1 A method for freely browsing VB and a method for marking

[0166] CT (Computed Tomography) imaging equipment scans to generate CT images.

[0167] 1. Process the CT images. By performing lung segmentation on the chest CT image first, then segmenting the main bronchi and peripheral bronchi, and finally connecting the main bronchi and peripheral bronchi to form a whole bronchial segmentation, the bronchial tree is obtained; the pixel data of the bronchial tree is extracted, and the bronchial tree is extracted The pixel value of , is set to 1, and the pixel value of the rest (i.e., non-bronchial tree area) is set to 0. The extracted bronchial tree pixel data are the basis for subsequent processing.

[0168] 2. Using the centerline extraction method based on bronchial tree data to extract the centerline: various mature centerline extraction methods that have been disclosed so far can be used to extract the centerline data of the overall bronchi from the marke...

Embodiment 2

[0277] Embodiment 2 Another method for freely browsing VB and a method for marking

[0278] In this embodiment, when the unique path is obtained in step 4, these unique paths are directly named and marked; after the named mark, the named mark will be directly given to the currently browsed bronchial segment and recorded; in the next VB browsing When , the bronchial segment that has been named and marked can automatically display its named mark when browsing to the bronchi that is close to the bronchi. It is not necessary to use step 7 to select a branch from the pre-set bronchial naming branch template to mark and name the bronchial segment at the current browsing position. All the other are the same with embodiment 1.

[0279] These unique paths have more or less overlapping parts (for example, B1-B11 in B1-B11-B111 and B1-B11-B112 is the overlapping part), and all paths are used as the basis for subsequent path switching. Such as figure 1 As shown, B1, B11, B12, B111, B11...

Embodiment 3

[0280] Embodiment 3 A system for freely browsing VB and a system for marking by freely browsing VB

[0281] The system of free browsing VB in the present embodiment and the system that free browsing VB carries out marking (see Figure 7 ) all include a bronchial tree extraction module, which is used to perform lung segmentation on chest CT images first, then perform main bronchus segmentation and peripheral bronchus segmentation, and finally connect the main bronchus segmentation and peripheral bronchial segmentation to form an overall bronchial segmentation to obtain a bronchial tree; The pixel value of the tree is set to 1, and the pixel value of the non-bronchial tree area is set to 0;

[0282] The central line extraction module is used to extract the central line based on the bronchial tree to obtain a bronchial central line tree model; the central line coordinate data of each bronchus is composed of a series of points expressed based on three-dimensional space coordinates...

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Abstract

The invention discloses a method for freely browsing VB, which comprises the following steps: 1, firstly performing lung segmentation on a chest CT image, then performing main bronchial segmentation and peripheral bronchial segmentation, and finally connecting the main bronchial segmentation and the peripheral bronchial segmentation to form integral bronchial segmentation to obtain a bronchial tree; setting the pixel value of the bronchial tree to be 1, and setting the pixel value of the non-bronchial tree area to be 0; 2, extracting a center line to obtain a bronchial center line tree model; 3, generating three-dimensional model data of triangular patch; 4, obtaining a unique path from the inlet of the bronchus to the tip position of each bronchus; and 5, carrying out path switching. The invention also discloses a method for marking by freely browsing VB and a related system. According to the invention, a doctor can freely browse in the VB, and is not limited to a fixed path or a specified position, so that the doctor can freely jump and switch in all bronchial trees.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a method for freely browsing a virtual bronchoscope (VB) and a marking method and system. Background technique [0002] Virtual bronchoscopy (VB) is an imaging technique based on computed tomography (CT). It performs three-dimensional reconstruction and visualization processing (such as Volume Rendering) based on CT data or uses algorithms to extract the bronchi of the tracheal tree to generate corresponding bronchial images. With the help of this bronchial image, the lumen and diameter of the trachea, the left and right bronchi and the bronchial tree can be displayed more accurately. These images allow non-invasive endoluminal evaluation and corresponding planning of bronchial surgery. [0003] The current bronchial navigation system or software usually provides virtual bronchoscopy technology for preoperative planning, which can generate a corresponding fixed path along the bro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/00G06T17/00G06T15/00G06T7/136G06T7/11
CPCG06T19/003G06T17/005G06T15/005G06T7/11G06T7/136G06T2207/30061G06T2207/10081
Inventor 孙加源谢芳芳宋亮唐祺
Owner SHANGHAI CHEST HOSPITAL
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