Ultrasonic-based blood flow velocity measurement method and blood flow measurement method

A measurement method and technology of blood flow velocity, applied in blood flow measurement devices, ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic Permian technology, etc., can solve problems such as low detection efficiency, simplify detection difficulty, The effect of shortening the detection time, accurate blood flow and blood flow jitter index

Active Publication Date: 2016-04-13
成都思多科医疗科技有限公司
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  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of low detection efficiency caused by only one sub-sampling window in the existing D-mode imaging (pulse wave Dopp

Method used

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  • Ultrasonic-based blood flow velocity measurement method and blood flow measurement method
  • Ultrasonic-based blood flow velocity measurement method and blood flow measurement method
  • Ultrasonic-based blood flow velocity measurement method and blood flow measurement method

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Embodiment 1

[0042] Embodiment 1: as figure 1As shown, the present embodiment provides a method for measuring blood flow velocity based on ultrasound; including the following steps:

[0043] S100: a step of receiving a feedback radio frequency signal collected from the blood vessel under test, and obtaining a discrete IQ signal after Hilbert transforming the radio frequency signal; the feedback radio frequency signal is an ultrasonic pulse wave transmitted according to a preset pulse repetition frequency Feedback radio frequency signal after blood vessel detection.

[0044] In this step, the process of obtaining the discrete IQ signal through the Hilbert transform is expressed by the following formula:

[0045]

[0046] Among them, F c is the center frequency of each pulse signal in the pulse wave, F s is the sampling frequency, N num It is the length of the radio frequency signal collected, that is, the number of discrete signals collected from blood vessels; for example, when the ...

Embodiment 2

[0065] Embodiment 2: as Figure 5 As shown, this embodiment provides an ultrasound-based blood flow measurement method; including the following steps:

[0066] S100: a step of receiving a feedback radio frequency signal collected from the blood vessel under test, and obtaining a discrete IQ signal after Hilbert transforming the radio frequency signal; the feedback radio frequency signal is an ultrasonic pulse wave transmitted according to a preset pulse repetition frequency Feedback radio frequency signal after blood vessel detection.

[0067] In this step, the process of obtaining the discrete IQ signal through the Hilbert transform is expressed by the following formula:

[0068]

[0069] Among them, F c is the center frequency of each pulse signal in the pulse wave, F s is the sampling frequency, N num It is the length of the radio frequency signal collected, that is, the number of discrete signals collected from blood vessels; for example, when the sampling frequency...

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Abstract

The invention relates to the field of ultrasonic imaging, in particular to an ultrasonic-based blood flow velocity measurement method and blood flow measurement method. According to the blood flow velocity measurement method, acquired IQ signals are sub-sampled and divided through N sub-sampling windows covering blood vessel full-depth ranges, and the defect that a doctor needs to move a sub-sampling window constantly and can only detect parts, located in the sub-sampling window, of blood vessels in traditional D-mode imaging is overcome; blood flow distribution information of the blood vessels in various depth positions can be provided for users; besides, according to the blood flow measurement method, sub-window sampling in the blood vessel full-depth ranges is performed simultaneously, blood flow information in various positions in the blood vessel full-depth ranges is acquired, and more accurate flood flow and blood flow jitter index can be acquired according to the blood flow velocity information in various depth ranges.

Description

technical field [0001] The invention relates to the field of ultrasonic measurement, in particular to an ultrasonic-based blood flow velocity measurement method and a blood flow flow measurement method. Background technique [0002] In traditional ultrasound blood diagnosis, doctors usually use ultrasound B-mode imaging results or D-mode imaging (also known as pulse wave Doppler spectrum imaging) results to diagnose blood flow diseases, but because many blood flow diseases cannot be observed by B-mode imaging (such as vascular sclerosis and early diseases of the vessel wall), so D-mode imaging has been more and more widely used; however, due to technical limitations, most of the existing D-mode imaging only contains 1 sub-sampling window, and the sub-sampling window contains The range is very small (in D mode, only the blood flow velocity information in the sub-sampling window can be observed), and the doctor needs to constantly move the sub-sampling window to observe the bl...

Claims

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Application Information

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IPC IPC(8): A61B8/06
CPCA61B8/06A61B8/48A61B8/52A61B8/5207A61B8/5223
Inventor 刘西耀刘鑫邹长俊刘东权
Owner 成都思多科医疗科技有限公司
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