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Software And Hardware Design And Adaptive Algorithm Research Of Ultrasonic Imaging Experiment System

Posted on:2021-05-05Degree:MasterType:Thesis
Country:ChinaCandidate:X XuFull Text:PDF
GTID:2404330614960310Subject:Biomedical instruments
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Ultrasound imaging technology is one of the main research directions of medical imaging diagnostic equipment.Because of its convenient operation and real-time monitoring,it has attracted widespread attention from medical institutions.In recent years,with the continuous development of science and technology,many researchers have begun to expand new ultrasonic imaging applications and further improve the quality of ultrasonic imaging.Therefore,in order to obtain more raw ultrasound imaging data,many laboratory teams have begun to develop ultrasound imaging experimental systems with research capabilities.First,the basic structure of the multi-channel ultrasound imaging experimental system designed by the laboratory team is introduced,and the control program design,program simulation,and imaging result verification completed in this paper are elaborated.The experimental system can be customized to achieve different ultrasound imaging methods to obtain the required ultrasound imaging raw data.It also has the advantages of customization of imaging methods and scalability of ultrasound channels,which lays the foundation for future research on ultrasound imaging algorithms.Secondly,a set of ultrasound focusing parameter generation and composite imaging software system is designed.In conjunction with the above experimental system,various focusing imaging methods and ultrasound imaging display are realized by setting ultrasound imaging parameters.In addition,the software system can not only cooperate with the experimental system designed in this paper for multi-functional ultrasound imaging,but also be applicable to other research-type experimental systems to realize the display of ultrasound imaging.Finally,an adaptive weighting algorithm applied to far-focus ultrasound imaging is proposed to achieve high-quality ultrasound imaging.we propose an adjustable generalized coherence factor(a GCF)which is based on the generalized coherence factor(GCF).Then,the weighted factor is fused with the normalized auto-correlation factor(NAF)to form a new adaptive weighted coefficient for far-focus ultrasound imaging.It can be seen from the results of simulation and experiment that the weighting algorithm of the new factor can improve background imaging quality in the far-field imaging area compared with the traditionalCoherence factor(CF)weighting algorithm and NAF weighting algorithm.thereby further improving the overall quality of imaging.
Keywords/Search Tags:Ultrasound Imaging, Focused Imaging, Adjustable Generalized Coherence Factor, Normalized Auto-correlation Factor, Adaptive weighting
PDF Full Text Request
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