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简介：鉴于在医药图象的固有的点缀噪音，一个点缀减小方法基于一个期望最大化他们框架被建议。首先，in-phase/quadratureI/Q超声图象的真实部件被提取。然后，盲目地估计点散布了成像系统的函数PSF被用来。基于他们框架，最后，在维纳过滤器和各向异性的散开广告之间轮流出现的一个反复的算法被利用生产despeckled图象。比较实验被执行在上模仿并且在vivo超声图象。关于I/Q图象，建议方法平均由1.94和7.52的因素改进speckle-signal-to-noise比率S-SNR和图象的边保藏索引，这被显示出。同时，它平均由3.95的因素减少规范的摆平平均数的错误NMSE。模拟并且在vivo结果显示建议方法比退出的有更好全面的表演。

简介：Acoherence-basedcorrectionmethodwasproposedinordertoimprovethelateralresolutionandenhancethecontrastofmedicalultrasoundimaginginthepresenceofphaseaberration.Theaveragedcoherencefactorwasproposedatfirstandusedasametrictoevaluatephaseaberrationcorrection.Bymaximizingtheaveragedcoherencefactor,thetimedelayparameterofeachchannelwasadjusted.AnewsetofcoherencefactorswascalculatedandthecorrecteddatawasoptimizedtoformthefinalB-modeimage.Thesimulationsonpointtargetsandacystphantomshowedthattheproposedmethodoutperformedthenearestneighboringcrosscorrelationmethodandconventionalcoherence-weightingmethod,andthelateralresolutionandcontrastratiowasimprovedbyapproximately0.24mmand18dBrespectively.Theproposedmethodcombinedtheadvantagesofphaseerrorcorrectionandcoherence-weighting,whichcouldimproveimagingqualitieseffectivelyinmedicalultrasound.

简介：Thehemodynamicmechanismofrollingmanipulation(RM)oftraditionalChinesemedicalmassage(TCMM)isinvestigated.AnaxisymmetricalnonlinearmodelandanarbitraryLagrangian-Eulerianfiniteelementmethod(ALE-FEM)withrezoningalgorithmwereintroducedtostudytheviscousflowthroughanaxisymmetricalrigidtubewithaxiallymovingstenosistosimulatetherollingmanipulation.FlowrateandwallshearstresswereobtainedbysolvingcompleteNavier-Stokesequationsnumerically.Thenumericalresultsshowthatthestenosismovingfrequency,namelythefrequencyofrollingmanipulation,hasgreateffectonthedisturbanceofflowandthewallshearstress.Thestenosiscoefficient,whichcharacterizestheseverityofthestenosis,anotheradjustableparameterinrollingmanipulation,alsoshowsthesignificanteffectonflowrateandwallshearstress.Thesenumericalresultsmayprovidesomedatathatcanbetakenintoconsiderationwhenmassageisusedinclinic.

简介：在医药超声成像地里，由织物的速度不同类导致了以便获得高分辨率并且改正阶段错误，联合最小的变化beamforming的一个高分辨率的医药超声成像方法和一般连贯因素被介绍。首先，从元素的数据为集中被推迟；然后，多信道的数据被用于最小的变化beamforming；同时，数据从数组空格被转变到横梁空格计算一般连贯因素；最后，一般连贯因素习惯于重量最小的变化beamforming的结果。医药图象被成像系统得到。实验基于点目标和无回声的包囊目标被用来验证建议方法。结果证明在分辨率，对比和坚韧性的方面的建议方法比最小的变化beamforming和常规beamforming好。

简介：Wepresentaseriesofachievementsassociatedtothetransferofsimulationtechnologiestothebio-medicalenvironment.WeshowalsohowthenovelcollaborativeorganizationbuiltaroundGeant4haschangedthetraditionalconceptoftechnologytransferbetweentheHEPdomainandthebio-medicalenvironment,configuringatwo-wayinteraction.