Method for segmenting inhomogeneous medical image

A medical image, uniform technology, applied in the field of image analysis, can solve problems such as inability to achieve segmentation and inability to achieve segmentation

Inactive Publication Date: 2014-05-14
SOUTHERN MEDICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method only uses the homogeneous area as a node, and the generation of auxiliary seed points also depends on the homogeneous area. Therefore, when

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  • Method for segmenting inhomogeneous medical image
  • Method for segmenting inhomogeneous medical image
  • Method for segmenting inhomogeneous medical image

Examples

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example 1

[0039] Example 1 (Segmentation of non-uniform 2D medical images)

[0040] This embodiment takes figure 1 The illustrated abdominal CT (Computed Tomography) image of a certain patient is taken as an example to describe the implementation process of the method of the present invention. figure 1 The size of is 512·512, and the lumbar vertebrae to be segmented belong to heterogeneous targets, which include high-density cortical bone, medium-density cortical bone and low-density bone marrow. The specific segmentation method is as follows:

[0041] Step 1: Read in as figure 1 For the CT image shown, through the MATLAB GUI graphical interface, select the foreground seed points that can represent the lumbar vertebrae and the background seed points that represent other normal abdominal tissues. Overlay the selected seed points on figure 1 on, get as figure 2 For the abdominal CT image of the lumbar vertebrae to be segmented in the marked seed point set shown, the gray information...

example 2

[0050] Example 2 (Segmentation of non-uniform 3D medical images)

[0051] This embodiment takes Figure 8 The pelvic CT image containing the applicator taken by a certain cervical cancer patient receiving brachytherapy is taken as an example to describe the method of the present invention for the non-uniform three-dimensional medical image segmentation process. Figure 8 The size of the source is 256·256·55, and the source applicator in the figure is a non-uniform three-dimensional object, which includes high-density metal tubes, medium-density plastics, and low-density liquids and air. The specific segmentation method is as follows:

[0052] Step 1: Read in as Figure 8 For the pelvic CT image shown, select the foreground seed point representing the applicator and the background seed point representing other pelvic tissue structures through the MATLAB GUI graphical interface. Overlay the selected seed points on Figure 8 on, get as Figure 9 The pelvic CT image containin...

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Abstract

The invention relates to a method for segmenting an inhomogeneous medical image. The method for segmenting the inhomogeneous medical image comprises the following steps that firstly, foreground seed points and background seed points on the image to be segmented are selected; secondly, the probability that each grey level belongs to the foreground or the background of the image to be segmented is evaluated according to grey level information of a selected seed point set, the grey levels are mapped on all pixel points of the image, and therefore a corresponding probability density distribution graph is obtained; thirdly, the selected foreground seed points and the selected background seed points are used as growing seed points respectively, one probability threshold on the corresponding probability density distribution graph is used as a growing condition, a region growing algorithm is executed, and therefore a foreground seed point group and a background seed point group which have grown automatically are obtained; finally, the obtained seed point groups which have grown automatically are used as seed points of a random walk algorithm, the random walk algorithm is executed, and a final segmentation result is obtained. By the adoption of the method for segmenting the inhomogeneous medical image, the sensitivity to the number and the position of initial seed points can be reduced, and the segmentation precision of the inhomogeneous medical image is obviously improved.

Description

technical field [0001] The invention relates to image analysis, in particular to a method for segmenting medical images. Background technique [0002] With the rapid development of imaging medicine, the segmentation of medical images is of great significance for clinical diagnosis and treatment. The current image segmentation algorithms are mainly divided into three categories: manual segmentation, interactive segmentation and automatic segmentation. Manual segmentation is time-consuming and requires extensive experience of the segmenter. Fully automatic segmentation does not require manual intervention, and is usually more suitable for the segmentation of simple and uniform images. However, for the segmentation of complex and diverse medical images, the accuracy of segmentation usually cannot meet the clinical needs. The interactive segmentation only needs to add a small amount of manual intervention, and it can automatically segment better results. In order to meet the ...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 陈海斌周凌宏甄鑫王琳婧肖阳胡洁
Owner SOUTHERN MEDICAL UNIVERSITY
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