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Bone inhibition method in chest X-ray image

A bone suppression and optical image technology, applied in the field of X-ray image processing, can solve the problems of low gray contrast in the edge area, complex bone structure, difficulty in bone segmentation and suppression, etc.

Inactive Publication Date: 2014-05-28
SHENYANG AEROSPACE UNIVERSITY
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AI Technical Summary

Problems solved by technology

However, due to the complex structure of bones in ordinary X-ray images and the low contrast of the gray scale in the edge area, it is difficult to achieve bone segmentation and suppression using only ordinary X-ray images.

Method used

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  • Bone inhibition method in chest X-ray image
  • Bone inhibition method in chest X-ray image
  • Bone inhibition method in chest X-ray image

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Experimental program
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Embodiment Construction

[0122] like Figure 1 to Figure 5 Shown, the present invention takes to carry out as follows:

[0123] Step 1: Determination of the initial contour position of the model lung;

[0124] Step 1.1: mark the boundary points of the lung boundary of each image in the training set;

[0125] Step 1.2: Align the training shape vectors; align the training shapes by scaling, rotating, and translating operations so that they are aligned as tightly as possible, let x i is the vector of n points in the i-th shape in the training set, x i =(x i0 ,y i0 ,...x ik ,y ik ,...,x in-1 ,y in-1 ) T . Among them, (x ik ,y ik ) is the kth point in the i-th shape, given two similar shapes x i and x j , select rotation angle θ, scaling s, translation (t x ,t y ), then M(s,θ)[x] represents the transformation with rotation angle θ and scaling factor s, so that the following weighted sum is minimized x i map to x j :

[0126] E. j =(x i -M(s,θ)[x j ]-t) T W(x i -M(s,θ)[x j ]-t) (1) ...

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Abstract

The invention belongs to the technical field of X-ray image processing, and specifically relates to a bone inhibition method in a chest X-ray image. A lung contour model is established for a normal chest image in a dual-energy silhouette image, three-order B batten wavelet transformation is then applied to perform three-scale wavelet decomposition on the image, a characteristic image is extracted by use of a 2-jet method from the decomposed image, then a bone model is established by use of a support vector regression machine, the bone model is applied to an X-ray image for extracting a corresponding prediction bone image, and finally, image subtraction is carried out on the X-ray image and the predicted bone image so as to obtain a predicted soft tissue image. Because most of bone inhibition methods employ a nerve network method, the method is liable to local optimum and the training result is not yet stable. Therefore, the method provided by the invention employs the support vector regression machine to carry out bone prediction, and a better result is obtained.

Description

technical field [0001] The invention belongs to the technical field of X-ray image processing, and in particular relates to a bone suppression method in chest X-ray images. Background technique [0002] Lung cancer is one of the most harmful malignant tumors to human health today. Especially in the past half century, with the continuous deterioration of the environment caused by air pollution and the large increase in the number of smokers, the incidence and mortality of lung cancer in various countries have been rising sharply. Since the lung is an internal organ of the human body, most lung cancers just grow quietly in the body at the beginning, and the patient does not feel anything. When patients go to the doctor due to clinical symptoms such as cough, hemoptysis, and chest pain, most of them are already in the middle and late stage, and the best time for treatment has been missed. Therefore, early diagnosis and treatment of lung cancer is the key to improve the surviv...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T5/00
Inventor 郭薇张国栋丛林王柳
Owner SHENYANG AEROSPACE UNIVERSITY
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