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Method and device for extracting metallic foreign body from X-ray image

A technology of metal foreign body and extraction method, which is applied in the fields of radiological diagnosis instruments, image analysis, image data processing, etc., can solve the problems of unreliability, too dark display of objects of interest in images, and default grayscale display, etc. The effect of reducing the effect of enhancement and improving the default display effect

Inactive Publication Date: 2010-12-01
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

Although the histogram analysis in the algorithm can solve the problem of compressing the dynamic range of a part of the metal, if the metal area is relatively large, this method is not reliable, which leads to the focus of the default grayscale display on the metal, resulting in a sense of distortion in the image. Objects of interest are too dimmed

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  • Method and device for extracting metallic foreign body from X-ray image
  • Method and device for extracting metallic foreign body from X-ray image
  • Method and device for extracting metallic foreign body from X-ray image

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Embodiment Construction

[0021] Such as figure 1 As shown, the method for extracting metal foreign objects in X-ray images according to this embodiment mainly includes a reading step 101 , an edge detection step 107 , an identification step 109 , and a region growing step 111 . In addition, a selection step 103 , a preprocessing step 105 , and an adjustment step 113 are also optionally included. The specific process of processing the image by using the method for extracting metal foreign matter in the X-ray image according to this embodiment is as follows:

[0022] Read step 101

[0023] The read-in images are processed by the beam limiter and corrected for dead pixels and broken lines. A small number of dead pixels and bad lines may not affect the final result of this processing, but a large number of dead pixels and bad lines may affect the detection accuracy.

[0024] In order to reduce the amount of calculation and facilitate identification, the image region within the beam limiter can optional...

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Abstract

The invention discloses a method and a device for extracting a metallic foreign body from an X-ray image. The method mainly comprises the following steps of: reading image data; detecting a complete edge of the metallic foreign body; recognizing a pixel point which satisfies a gray scale condition and span judgment as a metallic foreign body mark point; and growing the region of the image by using the metallic foreign body mark point as a seed point and the complete edge of the metallic foreign body as a constraint condition to obtain a metallic foreign body region. According to the method and the device for extracting the metallic foreign body from the X-ray image of the embodiment of the invention, the metallic foreign body which influences image enhancement in the image is eliminated, and then, the image is displayed in an enhancement mode in order to reduce the enhancement influence of a dissecting image by the metallic foreign body and improve the default display effect of the image.

Description

technical field [0001] The invention relates to digital image processing and identification technology, in particular to a method and device for extracting metal foreign objects in X-ray images. Background technique [0002] In digital image processing and recognition technology, the purpose of region-based image segmentation is to segment the target region of interest from the image. Threshold segmentation method is a commonly used image segmentation method. In the threshold segmentation method, the segmentation threshold point is usually obtained by analyzing the image histogram, and then using threshold segmentation (such as overall threshold, coordinate threshold and regional threshold, etc.) to obtain target area. [0003] Problems and phenomena reported through clinical trials show that metal foreign objects may cause the default display of target images in X-ray images to be darkened. After choosing different body positions and / or adding metal interference objects, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/02G06T7/60
Inventor 徐启飞孙文武
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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