眼部血流多普勒信號(hào)的檢測與研究.pdf

1、中國協(xié)和醫(yī)科大學(xué)碩士學(xué)位論文眼部血流多普勒信號(hào)的檢測與研究姓名：王曉春申請學(xué)位級(jí)別：碩士專業(yè)：生物醫(yī)學(xué)工程指導(dǎo)教師：王延群20070601中國醫(yī)學(xué)科學(xué)院中國協(xié)和醫(yī)科大學(xué)碩士學(xué)位論文ABSTRACTUltrasoundDopplerimagingisusedtomeasuretheparameterofbloodflowaccordmgtoDopplerphenomenonIthasmanymerits，suchasconvenientv

2、isual，noninvasive，repetitiveandoanbeobservedcontinuouslyanddynamicaUyInrecentyears，UltrasoundDopplerimagingisdevelopedrapidlyinthedia擎losefieldofophthalmologyanditsfieldofapplicationisbroadcnedstepbystepItcannⅡlkcstudyso

3、feyeball’stissue，thecharacteristicsofbloodflowkineticsandpamolo舀calstatebyexaminingthepositionthedirectionandvelocityofbloodflowofophthalmicaft既y，centralretinalarteryandpostefiorciliaryarteryaswellasthebloodvesselsintheb

4、ackofeyeballUltrasoundDopplerimagingprovidesconveniencefordiagnosevariousophthalmicdiseases，broadensthefieldofvisionandoffsetthelimitationofotherscv酬kindsofmedicalimagingIthasimportantvaluefordiagnoseanddistinguishvariou

5、sophthalmicdiseasessuchasorbitalbloodvesseldisease，thetlltnoLllinentopticandorbitalcavityeyegrounddiseaseand鳶缸【c0舭，ThisprojectdetectsDopplersignalsofeyebloodflowwhichisbasedOnophthalmicultrasounddiagnoseinstntmentThispap

6、erwillgiveanintroductionofUltrasoundDopplerimaginganddiscourse011thehardwarecircuitofentiresystemFurthermore，thispaperwilldescribethewbokprocessofhowtoUansmitreceive，magllifyathighfrequencydemodulationanddistancegatingMo

7、reoveritstransmitstimulationofpulse，dualchannelquadraturesignalsandsamplingvolumealecontrolledbyCPLDEventuallybyinputingthesesamplingdataintocomputerusingthesoftwareMATLABtoaccomplishdigiudfilterandthendrawtimefrequencya