Coding-enhanced focused ultrasound bone tissue microstructure detection method in bone ultrasound system

Abstract

The invention discloses a coding-enhanced focused ultrasound bone tissue microstructure detection method in a bone ultrasound system. The method includes the following steps: 1, adopting an ultrasound back scattering detection method, and enabling detection of a bone tissue microstructure to be equivalent to measuring of average scatterer interval according to a Faran cylinder model; 2, adopting a high-frequency single-array-element focused transducer, utilizing a complementary Golay sequence pair to excite an ultrasound transducer to emit time width signals, taking the emitted signals as a matched filtering function perform decoded compression on echo signals, and utilizing decoded compression back scattering signals to estimate the average scatterer interval, wherein the Golay sequence pair is adjustable in length. By the method, during measuring of the bone tissue microstructure MSS by utilizing ultrasound back scattering technology, ultrasound resolution ratio is increased, and influence, of sound attenuation, on measuring results is reduced. The coding-enhanced focused ultrasound bone tissue microstructure detection method is applied to the field of biomedical detection and tissue characterization.

Description

technical field [0001] The invention relates to a bone tissue microstructure detection method in a bone ultrasound system, in particular to a code-enhanced focused ultrasound bone tissue microstructure detection method. Background technique [0002] Biological tissues are mainly composed of periodically arranged collagen fibers, which can be equivalent to periodically distributed scatterers. Based on this, many existing models are used to characterize biological tissues, such as liver disease, blood vessel thickness, and bone trabecular spacing. Diagnosis of tissue disease is made by measuring the Mean Scatterer Spacing (MSS). [0003] Ultrasonic backscattering techniques have been proven to be effective in measuring MSS. Biological tissue backscatter signals include coherent components from regular scatterers and incoherent components from diffuse scatterers. The measurement of MSS mainly utilizes the coherent scatter component, while the diffuse scatter component interf...

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Problems solved by technology

[0005] In order to solve the problems of low frequency, insufficient resolution, and inability to effectively deal with a large amount of sound attenuation and noise in the tissue in the existing detection technology, the present invention provides a method for detecting the microstructure of bone tissue by focused ultrasound with code enhancement in the bone ultrasound system

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