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An extraction method of blood vessel centerline based on boundary distance field

A technology of center path and distance field, applied in the field of biomedicine, can solve the problems of deviation of observation habits and unguaranteed center path, and achieve the effect of improving accuracy, saving time, and being beneficial to diagnosis.

Inactive Publication Date: 2009-10-07
XIDIAN UNIV
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Problems solved by technology

[0008] (3) The center path extracted according to the boundary distance field cannot guarantee that the point on the center path is at the center of gravity of the cross-section of the vessel lumen, which will lead to deviations between the virtual roaming process of the vessel and human observation habits

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  • An extraction method of blood vessel centerline based on boundary distance field
  • An extraction method of blood vessel centerline based on boundary distance field
  • An extraction method of blood vessel centerline based on boundary distance field

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Embodiment Construction

[0046] The core idea of ​​the present invention is to use the octree to decompose the input CTA angiographic volume data, and use the information stored in the octree to accelerate the extraction of vascular tissue and the calculation of the boundary distance field; The information improves the calculation accuracy of the boundary distance field; the center of gravity method is used to correct the initial center path of the extracted blood vessels to improve the accuracy of the center path.

[0047] refer to figure 1 , the concrete steps of the present invention are as follows:

[0048] Step 1, performing octree decomposition on the input CTA angiography volume data to obtain information of each block.

[0049] (1a) Define the properties of the octree as follows;

[0050] Struct Octree

[0051] char LevelX, LevelY, LevelZ; / / The depth of the node in X, Y, and Z directions,

[0052] unsigned int X min , X max , Y min , Y max ,Z min ,Z max ; / / The coordinate range of the...

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Abstract

The invention discloses a high precision rapid extraction method of the centerline of blood vessels based on a boundary distance field, which mainly solves problem that both the extraction rate of blood vessel in CAT angiogram volume data and the extraction precision of centerline are low. The method comprises the following steps of using octree for partitioning the volume data and recording all blocking partition information; using relationship between maximum value and minimum value of each blocking partition and dual threshold for extracting blood vessels and calculating the boundary distance field; using the summation of reciprocal of gradient value of blood vessel voxel in the original CTA data and laplace transformation value as the initial value of the boundary distance; establishing a maximum cost spanning tree based on the boundary distance field and extracting the trunk of the tree as initial centerline of blood vessels; using gravity method for revising the initial centerline, thus leading the points on the centerline to be at the gravity center of the cross section of blood vessel lumen, thus obtaining the final blood centerline. The extraction method has the advantages of high blood vessel extraction rate, high centerline extraction precision, and is applicable to the centerline extraction of various lumen tissues.

Description

technical field [0001] The invention belongs to the technical field of biomedicine, and in particular relates to a method for extracting a central path of a blood vessel, which can be used for extracting the central path of various lumen tissues and is applied to a virtual endoscope. Background technique [0002] The precise extraction and description of blood vessels in medical images has a wide range of applications, such as the diagnosis of infarcted or stenotic vascular diseases and the registration of patient images at different times; Although there are many blood vessel extraction methods, they vary due to the influence of imaging modes, application fields, human-computer interaction and other factors. At present, there is no general extraction method that can be applied to all modes of medical images. The development of visualization technology enables people to display the obtained 3D data through various reconstruction methods to obtain useful information. For the...

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Application Information

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IPC IPC(8): G06K9/46G06T7/00
Inventor 高新波吕新荣邹华曹艳艳梁承志王向华查林李晋舟宁文博
Owner XIDIAN UNIV
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