《高频超声检测仪的研制及其在中耳积液诊断中的应用》.pdf

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1、论著IThesis·15·高频超声检测仪的研制及其在中耳积液诊断中的应用周盛，王晓春，计建军，杨军，王延群【摘要】目的：研制一种简单、可移动、性价比高的超声转换系统来诊断中耳炎。方法：超声换能器和鼓膜之间以水囊作为中间传输介质，通过测量超声反射回波信号的幅值和波峰数来判断是否存在积液。将中心频率10MHz、直径O．5mm的宽频带单阵元超声换能器置于狭长水囊之中，水囊充满水并伸入外耳道，使其前端与鼓膜接触。当中耳充满积液时，由于液体对超声能量的吸收，回波信息强度大幅下降，并伴有2个反射脉冲；当中耳内无积液时，回波信息为单一反射脉冲，幅值较强。结果：该检测仪可有效检测中耳积液的存在

2、，进而可旱期、准确而可靠地诊断中耳炎。结论：由于超声换能器发射和接收超声波束都是以水作为中间介质，对外界的噪声干扰不敏感，也不需要病患良好的配合，因此，临床上用高频超声来诊断中耳炎，特别是对于婴幼儿患者是一种可行的方法。【关键词】中耳炎；鼓膜；超声换能器；婴幼儿患者[中国图书资料分类号】R318．6；TH772~．1【文献标志码]A[文章编号]1003—8868(2015)06—0015-03DOI：10．7687，J．ISSN1003—8868．2015．06．015Accurateassessmentofmiddleearefusionusinghigh-frequency

3、ultrasoundZHOUSheng，WANGXiao—chun，JIJian-jun，YANGJun，WANGYan—qun(BiomedicalEngineeringInstitute，ChineseAcademyofMedicalSciences，Tianjin300192，China)Abstracta蛐eTodevelopasimple，portableandcost-efectiveultrasonographytodiagnosemiddleeareffusion．l翻血D由Awatersacwasfilledwithwaterasthetransmission

4、mediabetweentheultrasonictransducerandthetympanicmembrane．Thepresenceofthefluidinthemiddleearwasdeterminedbyevaluatingthereflectedsignalamplitudeandcountingthenumberofpeaks．Thecenterfrequencyoftheultrasoundtransducerwas10MHz，andthediameterwas0．5mm．Theultrasoundtransducerwasinputintoawatersac

5、．111ewatersacwasfilledwithwaterandinputintotheexternalauditorycanalwhendiagnosing．Incasetherewasanyinfectioninthemiddleear，thefluidwasbuiltupbehindthetympanicmembrane．Thepresenceoffluidmadereflectionsignalamplitudefromthetympanicmembranelowerthanahealthymiddleear．Inaddition．asecondechomightb

6、edetectedifthefluidcoveredupthewholetympanicmembrane．Iftherewasnofluidasincaseofhealthyear．thenonlyonestrongechofromthemembranewasdetected．ReTheultrasonographydetectedmiddleearefusionandd1UScoulddiagnoseotitismediaearlyandaccurately．Cjo啊dhThetransducertransmitsandreceivesultrasoundbeamthroug

7、hthewater，whichisinsensitivetotheexcessivebackgroundnoiseanddoesnotrequiresignificantco-operationfromthepediatricpatients．So，high-frequencyultrasonographymaybeanaccuratemethodfordiagnosingotitismediainchildren．【ChineseMedicalEquipmentJournal，2015，3