Blood flow measurement method based on Doppler blood flow spectrogram

Abstract

The invention discloses a blood flow measurement method based on a Doppler blood flow spectrogram. The blood flow measurement method is characterized by comprising the following steps: directly using the Doppler blood flow spectrogram to calculate the blood flow, that is, performing normalization processing on the data of the Doppler blood flow spectrogram, accumulating a product of a gray value of a normalized blood flow spectrogram image with a corresponding speed value, and finally obtaining a correct blood flow measured value by system calibration. According to the method disclosed by the invention, the blood flow is measured by using the blood flow spectrogram and the blood flow distribution, thereby avoiding the measurement of the blood vessel diameters, reducing the measurement errors and improving the blood flow measurement accuracy; and by adoption of the method, when Doppler blood flow imaging is performed, the blood flow speed can be obtained directly, the size of the blood flow can also be displayed on an imaging instrument in real time, and thus the blood flow measurement method has a clinical application value.

Description

technical field [0001] The invention belongs to the field of ultrasonic blood flow imaging, in particular to a method for measuring blood flow based on Doppler blood flow spectrogram. Background technique [0002] Blood flow is an important physiological index of human body. In the field of ultrasound blood flow imaging, the traditional calculation of blood flow needs to calculate the average velocity of blood flow and the cross-sectional area of ​​blood vessels. The blood vessel is regarded as a circle, and the maximum length is regarded as the diameter of the blood vessel to calculate the cross-sectional area. The measurement of the blood vessel diameter and the calculation of the cross-sectional area of ​​the blood vessel are the main sources of error in measuring blood flow in this way. In addition, the distribution of blood flow velocity in blood vessels is complicated, and using the average velocity to express the blood flow velocity will also cause certain errors. F...

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Problems solved by technology

However, the application of the spectrogram is currently mainly used to extract some parameters that reflect the blood flow conditions, such as the maximum systolic blood flow velocity S, the end-diastolic blood flow velocity D, the pulsatility index PI, and the resistance index RI. Calculation of blood flow has not been reported

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