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Ultrasound tomography method mixed with transmission and reflecting modalities

An ultrasonic tomography and transmission-reflection technology, which is applied to the analysis of fluids using sound waves/ultrasonic waves/infrasonic waves, the use of sound waves/ultrasonic waves/infrasonic waves for material analysis, and the analysis of materials can solve problems such as imaging failures and reduce imaging artifacts , Improving the image reconstruction accuracy, improving the solution accuracy and the effect of image reconstruction quality

Active Publication Date: 2019-06-14
TIANJIN UNIV
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Problems solved by technology

Based on the demodulation information, a reflection boundary constraint equation is built and a joint constrained image reconstruction method based on filtered back projection is proposed, which solves the problem of imaging failure in some cases in the transmission and reflection image reconstruction algorithms, and extends the algebraic reconstruction of filtered back projection Application of the method to improve the solution accuracy and image reconstruction quality of the inverse problem of ultrasonic process tomography

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  • Ultrasound tomography method mixed with transmission and reflecting modalities
  • Ultrasound tomography method mixed with transmission and reflecting modalities
  • Ultrasound tomography method mixed with transmission and reflecting modalities

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Embodiment Construction

[0034] The non-uniform shape constraint-based pixel range filtering ultrasound imaging algorithm of the present invention will be described with reference to the drawings and embodiments.

[0035] In the embodiment of the ultrasonic tomography image reconstruction method for industrial processes based on transmission-reflection dual-mode fusion, the embodiment uses a coefficient matrix based on the projection path length for the imaging of oil-water two-phase flow in industrial oil pipelines, which is a common application form of UT technology The construction method characterizes the forward problem model of ultrasonic visual detection of oil-water two-phase flow, and at the same time decomposes the solution process of the inverse problem of image reconstruction into four parts: digital orthogonal multiplication demodulation, construction of reflection constraint equation, calculation of transmission coefficient matrix and filter matrix, and joint image reconstruction. parts. ...

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Abstract

The invention relates to an ultrasound tomography method mixed with transmission and reflecting modalities. The ultrasound tomography method mixed with the transmission and reflecting modalities is used for reconstruction and visual representation of two-phase medium distribution in a measured object field. The ultrasound tomography method mixed with transmission and reflecting modalities comprises the steps that a time-varying ultrasonic signal is received; the obtained ultrasonic time-varying signal is demodulated by a digital orthogonality multiplication, and thus an orthogonality demodulated result is obtained; a boundary voltage measurement valve is obtained, and the corresponding time of the boundary voltage measurement valve is the demodulated transition time; the distance between adispersed phase medium boundary point and an ultrasonic transducer is calculated, and an ultrasonic reflecting constraint equation is established; the amplitude attenuation of an ultrasonic transducer receiving signal under the transmission modality is calculated; and the reconstruction result of the transmission and reflecting double-modality images are calculated.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic tomography, and relates to the realization of an ultrasonic tomography method using transmission-reflection mode fusion, which is used to realize the reconstruction and visual representation of the two-phase medium distribution in the measured object field. Background technique [0002] Ultrasonic Tomography (UT) is a structural imaging technology that reconstructs the measured field by arranging an ultrasonic sensor array outside the measured field and applying a certain excitation to obtain boundary voltage measurement data. Internal refraction coefficient, attenuation coefficient or acoustic impedance distribution. Compared with soft-field imaging techniques such as electrical impedance tomography (EIT) and electromagnetic tomography (Magnetic Impedance Tomography, MIT), UT has the advantages of non-invasiveness and high resolution. Imaging technologies such as X-ray Computed Tomography (X-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/02G01N29/032G01N29/44
Inventor 董峰刘皓谭超
Owner TIANJIN UNIV
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