Doppler blood flow velocity estimation method and system based on ultrasonic echo radio-frequency signals

Abstract

The invention relates to a Doppler blood flow velocity estimation method and system based on ultrasonic echo radio frequency signals. The method includes a converting step, namely converting the entire-frame ultrasonic echo radio frequency signals into analytic signals; a segmenting step, namely segmenting the entire-frame analytic signals according to the preset window length and acquiring segmented window data segments; a product summary step, namely performing once no-offset product summary on the segmented window data segments corresponding to two adjacent frames and acquiring a target plurality; a phase calculating step, namely calculating the phase of the target plurality; and a velocity estimating step, namely utilizing the phase to calculate and acquire average moving velocity of the blood between two frame signals. According to the Doppler blood flow velocity estimation method based on the ultrasonic echo radio frequency signals, signal analytic and low-pass filtering are omitted, calculation is simplified, negative impact on results by filtering is eliminated, the calculating amount is reduced, and calculating time is shortened greatly.

Description

technical field [0001] The invention relates to the field of ultrasound imaging, in particular to a Doppler blood flow velocity estimation method and system based on ultrasound echo radio frequency signals. Background technique [0002] The Doppler effect refers to the change in the wavelength of an object's radiation due to the relative motion of the wave source and the observer. In front of the moving wave source, the wave is compressed, the wavelength becomes shorter and the frequency becomes higher; when the moving wave source is behind, the opposite effect occurs. [0003] The Doppler effect of ultrasound echoes is used to measure the velocity of arterial blood flow, that is, ultrasound Doppler (Doppler) velocity estimation. Since the blood in the blood vessel is a flowing object, the Doppler effect occurs between the ultrasonic vibration source and the relatively moving blood. As the blood vessel moves toward the ultrasound source, the wavelength of the reflected wav...

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Problems solved by technology

[0010] Based on this, it is necessary to provide a Doppler blood velocity estimation method based on ultrasonic echo radio frequency signals that can save calculation time in view of the large amount of calculation and time-consuming problem of the traditional ultrasound Doppler blood velocity algorithm

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