Method and device for regulating measuring range of movement velocity based on spectral Doppler

A technology of measurement range and movement speed, which is applied in the direction of blood flow measurement devices, etc., can solve the problems of increasing FPGA chip scale, increasing system cost, and increasing calculation workload, and achieves the effect that the measurement range cannot be realized

Active Publication Date: 2009-06-24
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

For example, when using FPGA to implement this function, the workload of calculation increases, and the scale of FPGA chip needs to be increased accordingly, thus increasing the cost of the system

Method used

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  • Method and device for regulating measuring range of movement velocity based on spectral Doppler
  • Method and device for regulating measuring range of movement velocity based on spectral Doppler
  • Method and device for regulating measuring range of movement velocity based on spectral Doppler

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Embodiment Construction

[0026] Figure 4 It is a block diagram of an ultrasonic motion speed detection system that can realize the present invention. Figure 4 The ultrasonic motion speed detection system shown includes: a Doppler probe, used to receive ultrasonic echo signals carrying motion speed information; a beam forming / amplifying unit, used to perform beam forming and signal amplification on the above ultrasonic echo signals, The radio frequency echo signal is obtained; the quadrature demodulation unit performs quadrature demodulation on the synthesized radio frequency echo signal; the filter unit filters the demodulation signal output by the quadrature demodulation unit to obtain the Doppler frequency of the motion velocity The analog-to-digital conversion unit converts the analog Doppler frequency shift signal into a digital signal; the data buffer unit buffers the digital signal output by the analog-to-digital conversion unit; the spectral Doppler spectrum analysis unit converts the Doppler...

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Abstract

The invention provides a device for adjusting the measuring range of the movement velocity on the basis of spectral Doppler, which comprises: a measuring range receiving unit for receiving the input measuring range of the movement velocity; a sampling clock providing unit for providing a sampling clock signal, wherein the frequency of the sampling clock signal is different along with the difference of the received measuring range; and a digital-to-analog conversion unit for sampling Doppler frequency shift signals that reflect the movement velocity according to the frequency of the sampling clock signal so as to obtain Doppler frequency shift data within the received measuring range. According to the device, a simple and easily-actualized method is adopted to achieve the fine change within the measuring range of the movement velocity on the basis of the spectral Doppler and achieve precise measurement effect.

Description

technical field [0001] The invention relates to motion speed measurement based on spectrum Doppler, in particular to a method and device for adjusting the range of motion speed measurement based on spectrum Doppler. Background technique [0002] Measurements of the velocity of motion of objects, such as blood velocity, can be accomplished with spectral Doppler techniques. [0003] For example, continuous wave Doppler imaging is often required when clinicians want to obtain relevant information about a patient's high-velocity blood flow. The basic principle of continuous wave (CW) Doppler imaging in the medical ultrasonic diagnostic system is: transmit ultrasonic signals through the probe and detect the Doppler frequency shift signal in the ultrasonic echo signal, and then use the spectral analysis method to calculate the blood flow and the speed of moving tissue, and finally reflected by a spectrogram or an audio signal, wherein the spectrogram displays the blood flow signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/06
Inventor 尤奎皮兴俊胡锐李勇
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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