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X-ray coronary arteriography image-based cardiac cycle obtaining method

A technique for contrasting images and cardiac cycles, which is applied in the field of medical image processing, can solve problems such as asynchronous electrocardiogram and contrasting images, complicated clinical operations, unfavorable coronary artery analysis, etc., so as to facilitate coronary artery analysis, simplify clinical operations, and reduce diagnosis. Effect

Active Publication Date: 2018-09-21
SUZHOU RAINMED MEDICAL TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the ECG gating device is not a standard configuration of the contrast system, additional equipment is required, which will not only make the clinical operation more complicated, but also there may be asynchronous problems between the ECG and contrast images, which is not conducive to coronary artery disease. Analysis

Method used

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  • X-ray coronary arteriography image-based cardiac cycle obtaining method
  • X-ray coronary arteriography image-based cardiac cycle obtaining method
  • X-ray coronary arteriography image-based cardiac cycle obtaining method

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Embodiment

[0029] Example: When doing X-ray coronary angiography, usually a part of the guiding catheter will enter the angiographic image, and the guiding catheter is attached to the surface of the heart, and its simple harmonic motion can indirectly reflect the basic motion of the heart, because the guiding catheter movement belongs to rigid body motion , which is more conducive to analyzing its operation.

[0030] refer to figure 1 As shown, the cardiac cycle acquisition method based on X-ray coronary angiography image of the present invention comprises the following steps:

[0031] Step S1: extract the moving image of the guiding catheter from the angiography image, refer to figure 2 As shown; assuming that f(x, y, k) represents the image of the kth frame, then the guide catheter moving image I(x, y) is expressed as:

[0032]

[0033] In the formula, width represents the width of the X-ray contrast image;

[0034] I xz (x',y',k'), I yz (x', y', k') are expressed as:

[0035...

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Abstract

The invention discloses an X-ray coronary arteriography image-based cardiac cycle obtaining method. The method comprises the following steps of S1: extracting a guiding catheter motion image from a radiography image; S2: performing image enhancement preprocessing on the guiding catheter motion image; S3: calculating an optimal segmentation threshold of an enhanced image through an Otsu method, andperforming threshold segmentation on the image; and S4: calculating a guiding catheter center of each row in the segmented image, thereby finishing the obtaining of a cardiac cycle. The method has the advantages that the corresponding cardiac cycle is obtained by analyzing a simple harmonic motion of a guiding catheter; and the method not only can reduce diagnosis and treatment devices and simplify clinical operation but also better facilitates coronary artery analysis based on X-ray radiography.

Description

technical field [0001] The invention belongs to the technical field of medical image processing, and relates to a cardiac cycle acquisition method based on X-ray coronary angiography images. Background technique [0002] Coronary arteries are the arteries that supply blood to the heart. They are the first pair of branch arteries of the aorta from the heart. They are divided into left and right branches, distributed on the outer surface of the heart and branched out into many small branches, forming abundant capillaries to supply myocardial blood. According to the survey of the World Health Organization, cardiovascular diseases (such as hypertensive heart disease, coronary heart disease, arteriosclerosis and other diseases) are one of the main causes of disease death in developed countries, and cardiovascular diseases have now been listed as one of the most threatening diseases to human health. one. [0003] X-ray coronary angiography, as one of the commonly used methods for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/136
CPCG06T7/0012G06T7/136G06T2207/10116G06T2207/20036G06T2207/30048G06T2207/30101
Inventor 霍云飞王鹏刘广志霍勇龚艳君李建平易铁慈杨帆
Owner SUZHOU RAINMED MEDICAL TECH CO LTD
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