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Method of measuring pulse wave velocity of ascending aorta by improved diameter velocity loop method

A pulse wave velocity, ascending aorta technology, applied in the measurement of pulse/heart rate, blood flow measurement device, acoustic wave diagnosis, etc., can solve the problems of narrow experimental data range and high data image requirements, to improve fault tolerance and reduce manual intervention. Effect

Active Publication Date: 2021-06-15
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

Negoita used this method to measure the PWV of the ascending aorta of 13 healthy individuals, and in 2018 perfected the extraction method of arterial diameter and blood flow velocity, and measured the PWV of the ascending aorta of 10 healthy individuals, but the method still exists When extracting diameter waveforms, there are high requirements for data images, and problems such as narrow range of experimental data

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  • Method of measuring pulse wave velocity of ascending aorta by improved diameter velocity loop method
  • Method of measuring pulse wave velocity of ascending aorta by improved diameter velocity loop method
  • Method of measuring pulse wave velocity of ascending aorta by improved diameter velocity loop method

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Embodiment 1

[0040] The improved diameter velocity loop method of the present invention measures the method for ascending aortic pulse wave velocity, comprises the following steps:

[0041] Step S10, using the R-wave peak of the electrocardiogram to segment the cardiac cycle on the M-mode ultrasound image and the D-mode ultrasound image of the ascending aorta, respectively;

[0042] Step S20, in the M-mode ultrasound image of the segmented cardiac cycle (such as figure 2 As shown), the adjacent cardiac cycle images are superimposed to obtain superimposed images;

[0043] Step S30, obtain the upper and lower walls of blood vessels in the superimposed image in step S20 by the threshold method, such as figure 2 As shown, and use different thresholds to process the image for the upper and lower walls of the blood vessel;

[0044] Step S40, for the image processed in step S30, obtain the upper and lower wall boundaries of the blood vessel through the threshold method and the center of gravi...

Embodiment 2

[0056] The improved diameter velocity loop method of the present invention measures the method for ascending aortic pulse wave velocity, comprises the following steps:

[0057] Step S10, using the R-wave peak of the electrocardiogram to segment the cardiac cycle on the M-mode ultrasound image and the D-mode ultrasound image of the ascending aorta, respectively;

[0058] Step S20, extracting four diameter waveforms (D) of the ascending aorta from the M-mode ultrasonic image of the segmented cardiac cycle;

[0059] Step S30, extracting four blood flow velocity waveforms (U) of the ascending aorta from the D-mode ultrasonic image of the segmented cardiac cycle;

[0060] Step S40, obtain the rising points in the diameter waveform (D) and the blood flow velocity waveform (U) respectively, and use the linear regression method to calculate all possible matching combinations of D and U (4D*4U=16), and calculate all Combined PWV value;

[0061] Step S50 , sort all the PWV values ​​an...

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Abstract

The invention discloses an improved diameter velocity loop method for measuring the pulse wave velocity of the ascending aorta. The diameter waveform of the ascending aorta was extracted from the M-mode ultrasound image of a good cardiac cycle; the blood flow velocity waveform of the ascending aorta was extracted from the D-mode ultrasound image of a good cardiac cycle; the diameter waveform and the blood flow velocity waveform were respectively obtained Ascent point, and use RANSAC to calculate PWV value. The invention reduces the excessive manual intervention of the original ln(D)U-loop method when calculating the diameter waveform through the image data of the ultrasonic M mode through the improved diameter waveform extraction method combined with the gradient calculation and the center of gravity method, and can effectively shorten the The processing time of the diameter waveform extraction and the reduction of errors; thus improving the error tolerance rate when calculating the diameter waveform.

Description

technical field [0001] The invention relates to a method for measuring the pulse wave velocity of ascending aorta by an improved diameter velocity loop method. Background technique [0002] Cardiovascular disease (CVD) is the leading cause of death worldwide. Early detection and risk assessment of cardiovascular disease can help reduce overall cardiovascular disease-related morbidity and mortality. According to the "China Cardiovascular Disease Report 2018", the prevalence and mortality of cardiovascular diseases in China are still on the rise. It is estimated that there are 290 million people with cardiovascular diseases, including 13 million strokes, 11 million coronary heart diseases, and 245 million high blood pressure. million, accounting for more than 40% of the residents' disease deaths. Atherosclerosis is widely recognized to be associated with cardiovascular risk, providing a robust index for cardiovascular risk assessment. Therefore, a simple, non-invasive metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/02A61B8/06
CPCA61B8/02A61B8/06A61B8/0891A61B8/486A61B8/5215A61B8/5269
Inventor 彭博谭元浩张全
Owner SOUTHWEST PETROLEUM UNIV
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