An ultrasonic transcranial doppler signal intelligent analysis method, system and device

Abstract

The present application relates to a kind of transcranial doppler signal intelligent analysis method of ultrasound, comprising: step S1, the blood flow doppler signal pre-processing of acquisition is to obtain blood flow frequency shift signal;Step S2, the signal envelope of blood flow frequency shift signal and the short-time energy of signal envelope are calculated;Step S3, when detecting that short-time energy exceeds set threshold, signal feature is extracted, signal feature includes event duration and instantaneous frequency variance;Step S4, comprehensive decision is carried out according to short-time energy and signal feature, if meet condition, then output detection signal.The present application constructs the multi-dimension feature decision method including short-time energy, event duration, instantaneous frequency variance, greatly reduces the interference of various noises, significantly improves detection accuracy.

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