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Method for real-time estimating Doppler parameter and device

A Doppler parameter, real-time calculation technology, applied in the field of ultrasound, can solve the problems of fixed time, low search efficiency, inability to take into account the real-time performance and accuracy/stability of parameter estimation, and achieve the effect of fast processing results

Active Publication Date: 2008-11-12
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

However, the first method requires operator involvement, which increases the complexity of the measurement
In the second method, the time of 200ms is too fixed, and the search efficiency is not high when the heart rate is small
Therefore, the disadvantages of the above-mentioned prior art are that neither the real-time performance nor the accuracy / stability of parameter estimation can be taken into account.

Method used

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  • Method for real-time estimating Doppler parameter and device
  • Method for real-time estimating Doppler parameter and device

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Embodiment Construction

[0034] The method and device of the present invention can be applied to the processing of the maximum flow velocity curve, and will also be applicable to the processing of the average flow velocity curve. For the sake of brevity, the following best embodiment shown in the accompanying drawings only mentions the maximum flow velocity curve and takes it as an example to further illustrate the present invention.

[0035] image 3 for from figure 2 A section of the maximum flow velocity curve of the carotid Doppler signal spectrogram represents the time with the abscissa, and the ordinate represents the frequency (velocity). The present invention stores this section of curve data in the data buffer. In order to calculate the quasi-cardiac cycle, the The above buffer should be able to store data of at least two cardiac cycles.

[0036] Assume that the maximum cardiac cycle is T max seconds, the sampling rate of the maximum velocity curve is fs, then the maximum length of the bu...

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Abstract

The present invention provides a real-time estimation method and apparatus for Doppler parameter, used for automatically computing and processing Doppler parameter of current curve of motor tissue or bloodstream sound spectrogram in real time in ultrasonic diagnosis system. The method comprises circular steps of: selecting a section of data from the current curve with preset data buffer zone in turn to estimate present eka-cardiac cycle; determining present search threshold value of peak flow rate; searching present peak flow rate according to the threshold value and the eka-cardiac cycle. The search period is shortened and the search accuracy is improved by using peak search period especially in the search process of the peak flow rate. By employing the invention, the system has advantages of low cost, high real time performance and reliable result.

Description

technical field [0001] The invention relates to ultrasound technology, in particular to signal data processing in medical ultrasound scanning, in particular to a method and device for real-time estimation of Doppler blood flow parameters. Background technique [0002] Ultrasonic Doppler technology is widely used in the non-destructive detection and measurement of human blood flow. Among them, both continuous wave (CW) Doppler technology and pulse wave (PW) Doppler technology belong to spectral Doppler technology, that is, to analyze the frequency spectrum of Doppler blood flow signal to obtain its spectrum distribution, so that according to Doppler The distribution of blood flow velocity in blood vessels is estimated by the principle of Le effect. PW can observe the blood flow characteristics in a specific area, however, because the maximum pulse repetition frequency (PRF) is inversely proportional to the detection depth, the highest flow velocity that can be measured is li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/06
Inventor 张官喜张羽
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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