| The influence of |ω| filter on nonlinearity parameter imaging using filtered convolution method |
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| 作者姓名： | ZHANG Dong and GONG Xiufen (Lab. of Mordern Acoustics. Institute of Acoustics Nanjing University Nanjing 210008) |
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| 作者单位： | Lab. of Mordern Acoustics. Institute of Acoustics，Nanjing University，Nanjing 210008 |
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| 摘 要： | I.IntroductionThenon1inearityparametcrB/AisanimportantparametcrtomcasurcthenonlinearityofamediumandisdcfincdbythcratioofcoefficientsofquadratictermtolineartermintheTay1orexpansion.Itdcscribcsthedistortionofasinewaveasitpropagatesthroughtheme-dium.Inreccntycarsmuchattcntionhasbccnfocusedontheinvestigationofnon1incarityparameterinbio;ogicalmediasinceitcanprovidedynamicalinformationofthemediaandgivemoresensitivediffcrcnccbctwccnnorma1andabnorma1tissuesthantheotherlinearultrasonicparametcrssucha…
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