Method for constructing three-dimensional blood vessel model based on ball B-spline curve

A construction method and spline curve technology, applied in the medical field, can solve problems such as unsatisfactory reconstruction effect

Active Publication Date: 2011-09-14
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0006] In view of the above-mentioned defects, the object of the present invention is to provide a method for constructing a three-dimensional blood vessel model based on spherical B-spline curves, so as to solve the problem that the reconstruction effect of the free model method in the prior art is not ideal, and the jagged effect of the reconstructed surface needs to be eliminated by smoothing. shortcoming

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  • Method for constructing three-dimensional blood vessel model based on ball B-spline curve
  • Method for constructing three-dimensional blood vessel model based on ball B-spline curve
  • Method for constructing three-dimensional blood vessel model based on ball B-spline curve

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Embodiment 1

[0079] Such as Figure 5 As shown, the construction method provided by the present invention comprises the following steps:

[0080] S501: Acquire raw data of medical images;

[0081] S502: Separate the blood vessel data from the background;

[0082] The above two steps can be performed by current technology, so the two parts will not be described in detail.

[0083] S503: Calculate the vascular skeleton line according to the vascular data;

[0084] S504: Calculating the radius of the data point on the vascular skeleton line;

[0085] S505: Construct a blood vessel model according to the skeleton line and the radius of the corresponding point;

[0086] S506: Visualize the constructed blood vessel model in a computer.

[0087] Please refer to Fig. 6-Fig. 7, in step S503, use the GVF field to calculate the vascular skeleton line:

[0088] The GVF (Gradient Vector Flow) field was originally used in the field of two-dimensional image segmentation, and the GVF field acts on a...

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Abstract

The invention provides a method for constructing a three-dimensional blood vessel model based on a ball B-spline curve, comprising the following steps of: step one: obtaining original data of a medical image; step two: separating blood vessel data from a background; step three: calculating a blood vessel skeleton line according to the blood vessel data; step four: calculating radius of the data points on the blood vessel skeleton line; step five: constructing the blood vessel model according to the skeleton line and corresponding point radius; and step six: visualizing the constructed blood vessel in a computer. The three-dimensional blood vessel model constructed by the method provided by the invention has the advantages of high precision and small error.

Description

technical field [0001] The invention relates to the medical field, in particular to a method for constructing a three-dimensional blood vessel model based on spherical B-spline curves. Background technique [0002] Existing vascular modeling techniques can be roughly divided into two categories: model-free methods and model-based methods. [0003] The most typical and common surface reconstruction method in the method of free model is MC (Marching Cubes) algorithm. This method divides the space into two parts to achieve the purpose of reconstruction by selecting an appropriate threshold and calculating an isosurface by linear interpolation. However, the use of linear interpolation and the thresholding of the space into two parts are too simple, so the reconstruction effect is not ideal. Smoothing is required after reconstruction to remove the aliasing effect of the surface, and simple Laplacian smoothing methods will destroy small branches. Taubin proposed a low-pass filt...

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Application Information

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IPC IPC(8): G06T17/00
Inventor 武仲科冷昶周明全田沄王醒策
Owner BEIJING NORMAL UNIVERSITY
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