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A method and apparatus for identifying cardiac orientation in a chest X-ray film

A plain film and chest technology, applied in the field of image recognition, can solve the problems of low efficiency and high error rate, and achieve the effect of improving the recognition efficiency, reducing the error rate, and improving the effect of diagnosis and treatment

Active Publication Date: 2019-01-11
NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of completely relying on manual identification has disadvantages such as low efficiency and high error rate.

Method used

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  • A method and apparatus for identifying cardiac orientation in a chest X-ray film
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  • A method and apparatus for identifying cardiac orientation in a chest X-ray film

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A method for identifying the orientation of the heart on plain chest radiographs, cf. figure 1 , including the following steps:

[0046] Extract lung tissue contours from plain chest X-rays;

[0047] Calculate the slope of each point of the lung tissue contour;

[0048] The apex position is determined from the calculated slope.

[0049] Such as figure 2 Shown is a typical plain chest radiograph image. The gray levels of lung tissue A, soft tissue B and background C in chest X-ray are obviously different, so the chest X-ray image can be divided into three parts: background, soft tissue and lung tissue through gray scale comparison, among which the lung tissue Contains left part and right part. Further, the boundary between the lung tissue A and the soft tissue B is determined as the lung tissue outline by grayscale contrast. In the process of extracting the contour of the lung tissue, in order to improve the accuracy, the regions corresponding to the lung tissue A...

Embodiment 2

[0075] Assume that the pixel grayscale of a plain chest X-ray is a function of f(x, y), where (x, y) is the coordinate of each pixel. The standard for dividing the region according to the gray level can be: when 20<f(x,y)<100, the point is classified as lung tissue, and when 110<f(x,y)<200, it is classified as soft tissue, when f When (x, y)<10, it is classified as the background. This combination method divides the gray pixels of the lung tissue, soft tissue and background into three groups.

[0076] The method for extracting the boundary between lung tissue and soft tissue can be: when the gray value of adjacent pixels changes sharply, the pixel point is determined to be the boundary between lung tissue and soft tissue, that is, two adjacent points in the horizontal direction (x n ,y n ) and (x n-1 ,y n-1 ) satisfy|f(x n ,y n )-f(x n-1 ,y n-1 )|>10 can be considered as (x n ,y n ) and (x n-1 ,y n-1 ) is the boundary between lung tissue and soft tissue, and (x n ,...

Embodiment 3

[0081] In this embodiment, a device for identifying the heart position in a chest X-ray plain film includes a memory and a processor, the memory is used to store at least one program, and the processor is used to load the at least one program to execute the embodiment 1 or the method described in embodiment 2.

[0082] The device in this embodiment can also be connected to equipment such as a DR flat panel detector or a film scanner, so as to obtain electronic images of chest X-ray films for processing by a processor.

[0083] In sum, the beneficial effects of the present invention are:

[0084] It can automatically identify the location of the apex in the chest X-ray image through automatic equipment such as a computer, so as to further identify the heart position, avoid the need to manually observe the chest X-ray one by one for judgment and identification, improve recognition efficiency, and reduce errors Rate;

[0085] After the heart position is identified, correspondin...

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Abstract

A method and apparatus for identifying a cardiac orientation in a chest X-ray film includes the steps of extracting a lung tissue profile from the chest X-ray film, calculating a slope of each point of the lung tissue profile, determining a cardiac apex position based on the calculated slope, and the like. The apparatus comprises a memory and a processor. The invention can automatically identify the cardiac apex position in the chest X-ray plain film image through an automatic device such as a computer, thereby further identifying the cardiac orientation, avoiding the need of judging and identifying by observing the chest X-ray plain film one by one manually, improving the identification efficiency and reducing the error rate. Further, after the cardiac orientation is recognized, the corresponding warning message can be automatically given according to the recognition result to alert the medical personnel, so as to improve the diagnosis and treatment effect. The invention is widely applied to the field of image recognition.

Description

technical field [0001] The invention relates to the field of image recognition, in particular to a method and a device for recognizing the orientation of a heart in a chest X-ray plain film. Background technique [0002] Plain X-ray film is a widely used means of medical diagnosis and treatment, and can effectively diagnose and treat many diseases through X-ray plain film. Chest X-ray plain film is an X-ray plain film taken on the subject's chest. Through the chest X-ray plain film, images of human tissues such as the subject's lung tissue, heart and soft tissue can be clearly observed. Outside of the image, the rest of the plain chest x-ray is the background. [0003] Due to the asymmetry of human tissues and lesions, it is of great significance to distinguish the left and right positions of chest X-ray films. Take the chest X-ray plain film taken by DR flat panel detector as an example. During the actual shooting, the medical staff will place a lead mark in the shape of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/73G06T7/13A61B6/00
CPCA61B6/52A61B6/5211G06T2207/10116G06T2207/30048G06T7/13G06T7/73
Inventor 马乐苏瑾邹丹凤蔡裕兴陈卫国
Owner NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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