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1、1490ieeetransactionsonultrasonics,ferroelectrics,andfrequencycontrol,vol.56,no.7,july2009CorrespondenceLow-Cost,High-SpeedBack-Endechosignals(front-endsystem[3],[6]–[9])andforreal-ProcessingSystemforHigh-Frequencytimedisplay(back-endsystem).UltrasoundB-ModeImagingthebackendofareal-timeultrasou
2、ndimagingsys-temusuallyincludesanenvelopedetector,alogarithmicjinHochang,Member,IEEE,leisun,jesset.yen,compressor,andadigitalscanconverter(dsc).toreachMember,IEEE,andK.Kirkshung,Fellow,IEEEahighersignalprocessingspeed,theimplementationofsuchfunctionsrequiresamoresophisticatedelectronicde-Abstr
3、act—Forreal-timevisualizationofthemouseheart(6signintegratingmoreexpensivecomponents,andiscon-to13beatspersecond),aback-endprocessingsysteminvolv-sequentlyrelativelycostly.thisisparticularlytruewheninghigh-speedsignalprocessingfunctionstoformanddisplaytheoperatingspeedofthesefunctionsispushedh
4、igherimageshasbeendeveloped.Thisback-endsystemwasdesignedandhigherbecausemoreexpensiveelectroniccomponentswithnewsignalprocessingalgorithmstoachieveaframerateofmorethan400imagespersecond.Thesealgorithmswereandamoresophisticateddesignarerequiredtomeettim-implementedinasimpleandcost-effectiveman
5、nerwithasingleingconstraintsofelectronicsignals.field-programmablegatearray(FPGA)andsoftwareprogramsthispaperdescribesahigh-speedback-endsystemwritteninC++.Theoperatingspeedoftheback-endsystemsuitableforcardiacimaginginmice.theback-endsystemwasinvestigatedbyrecordingthetimerequiredfortransfer-
6、employedarecentlyreportedhigh-speedenvelopedetectorringanimagetoapersonalcomputer.Experimentalresultsshowedthattheback-endsystemiscapableofproducing433[10]andalinearinterpolationalgorithmfordigitalscanimagespersecond.Toevaluatetheimagingperformanceoftheconversion.acombinationofthesefunctionsan
7、defficientback-endsystem,acompleteimagingsystemwasbuilt.Thislook-uptable(lut)strategyenabledustoimplementtheimagingsystem,whichconsistedofarecentlyreportedhigh-high-speedback-endsysteminasimpleandcost-effectivespeedmechanicalsectorscann
