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1、超声诊断入门(Introductiontoultrasonicdiagnosis)Ultrasounddiagnosis・Txthusband,ifyoucanonlyliveinaday,Iwouldliketousemylifetocontinueyourlife,youhavetobehappylife,whentheproposedbreakup,pleasedonotsayloveme.Introductiontodiagnosticultrasound:basicarticles一Fundamentalsandtermino
2、logyofultrasounddiagnosisInordertomeettherequirementsofeveryone,wehavesetupanultrasoundentrycolumn.Themainobjectofthereaderistheultrasoundimagingworkersandcliniciansforotherimagingprofessionals1.forms:Illustrated2.datasource:personalcollectionnetworkexpertlecturescontent
3、,ifyouthinkIviolatedyourrights,pleasequicklywritetotellme,Iwillimmediatelydelete・3.duetothelimitedlevel,shortcomingsanderrorsareinevitable,pleasecriticizeandcorrect!DefinitionofultrasonicwaveUltrasonic(Ultrasound)referstothefrequencyofmorethan20thousandHz(Hertz,Hz)thatex
4、ceedsthehighlimitofhearingsound,whichbelongstothemechanicalwave.Whatistheprincipleofultrasoundgenerationandreception?Deviceandreceivingultrasonicprobe,whichisthecorecomponentoftransducerismainlycomposedofcrystalplate,mainphysicalpropertiesofcrystalwithpiezoelectriceffect
5、,notonlytohighfrequencyACelectricfieldinthecrystalonbothsidesofthepiezoelectricwaferalongacertaindirectioncompressionandstretchingvibrationwavesaregeneratedwhenalternatingcurrentin20000Hztheaboveistoproduceultrasonic,ultrasonic;conversely,sonicwavetransistorchip,crystalo
6、n-chipchargegeneration,chargemuchreactionintensityultrasoundcrystalplate;Thestructureofultrasonicdiagnosticinstrument:1.Probe:usedfortransmittingandreceivingultrasonicwave2、transmitcircuit:producehighfrequencyoscillationelectricsignaltoexcitethewaferintheprobetoproduceul
7、trasonicwave3.Receivingcircuit:receivingtheelectricalsignalreturnedbytheprobeandprocessingit1.Maincontrolcircuit:controlothercircuitbytriggerpulse2.Display:displaytheimageformedafterprocessing6,othercircuits:includingscanningcircuit,standardpitchcircuit,etc・Theworkingpri
8、ncipleofultrasonicdiagnosticinstrument:Highfrequencyoscillationelectricalsignaltoexcitethewaferinthepro
