A method for real-time analysis of ultrasonic blood flow signal quality

Abstract

The invention relates to an ultrasonic blood flow signal quality real-time analysis method. In the ultrasonic blood flow signal acquisition process, due to the fact that positioning deviation exists between a probe and a blood vessel, and due to influences of other factors, acquired ultrasonic blood flow signal quality fluctuation is large. According to the method, a sample entropy method is mainly used to evaluate the ultrasonic blood flow signal quality, firstly, ultrasonic blood flow signals in the blood vessel are obtained, and noise is removed; secondly, first-order difference processing and second-order difference processing are carried out on the ultrasonic blood flow signals; then the sample entropy method is used for calculating the entropy of the ultrasonic blood flow signals; and finally, a threshold is set to judge the quality of the ultrasonic blood flow signals in a real-time mode. The method has the advantages that quality evaluation of the ultrasonic blood flow signals is accurate, high-efficiency and high-speed effects are achieved at the same time and the like, and the method is suitable for real-time evaluation of various ultrasonic blood flow signals.

Description

technical field [0001] The invention relates to a real-time analysis method of signal quality, in particular to a nonlinear dynamic method for time series complexity analysis, and belongs to the technical field of signal complexity calculation in signal processing. Background technique [0002] Ultrasonic blood flow signal as a human physiological signal contains a lot of information related to human health, which provides great help for doctors' clinical diagnosis. For example, radial artery blood flows in the blood vessels of the human wrist, and these blood mainly originate from the heart and flow through various organs of the human body. The rich information of human organs such as structure also contains richer human physiological and pathological information, so that ultrasonic blood flow signals can be used to assist in the diagnosis and analysis of the health status of human organs such as gallbladder, kidney, stomach and lungs. [0003] In recent years, ultrasonic ...

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Problems solved by technology

[0004] However, in the clinical acquisition process of ultrasonic blood flow signals, because the probe needs to be manually operated by the physician, there is often a certain degree of deviation between the position of the probe and the blood vessel and the influence of some other factors (such as interference from the patient's body movement). The quality of the received ultrasound blood flow signal will fluctuate greatly

However, the existing ultrasonic blood flow signal acquisition equipment does not have the function of automatic evaluation of the quality of ultrasonic blood flow signals, resulting in a large number of ultrasonic blood flow signal data collected clinically cannot be accurately applied to various auxiliary diagnoses

In addition, in the previous ultrasonic blood flow signal acquisition process, only manual judgment of the quality of the ultrasonic blood flow signal can be used, but the manual method will greatly reduce the efficiency of sample collection, and there is no uniform standard, which is vulnerable to subjective and human factors. Interference seriously affects the development of ultrasonic blood flow signal-assisted diagnosis

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