简介：Objective:Establishnormativedatafortympanicelectrocochleography(TMECochG)parametersinnormalhearingadultswithoutMeniere'sdisease's(MD)symptoms.DescribeTMECochGvariablesthathelptodistinguishnormalfromMDears.Materialandmethods:Weenrolled100subjects(N?200ears),59females,agedbetween19and71yearsfrom09/2010to04/2014.Inclusioncriteria:normalotomicroscopy,hearingthresholds25dBnHLfrom250to4000Hz,normaltympanogram,nosymptomsofMDaccordingtotheAAO-HNS1995criteriaandGibson'sscore<7.Weexcludedsubjectswithdizziness,auralfullnessorothersymptomsofendolymphatichydrops.Thefollowingparameterswereanalyzed:SP/APamplituderatio,SP/AParearatioandthedifferencebetweenAPlatencywithrarefactionandcondensationstimuli.Results:Therewasnosignificantdifferencebetweenrightandleftears(Intraclasscorrelationcoefficient<0.6).SP/APamplituderatiovariedbetween0.084and0.356andSP/AParearatiobetween0.837and1.671(percentiles5and95).TheAPlatencydifferencetorarefactionandcondensationclickswasbetween0.0and0.333ms.Conclusion:NormativedataforTMECochGparameterswereestablishedin100normalhearingsubjectswithoutMD.Thesedatacanbeusedtodistinguishnormalfrompathologicalfindingsandinfollow-upofMDpatients.

简介：Objective:Electrocochleography(ECochG)isvaluabletodiagnoseMeniere'sdiseaseobjectively.TheaimofthepresentstudywastoprovidepreliminarynormativedataforECochGamongAsianadults.Theinfluencesofethnicity(MalayversusChinese)andgenderonECochGresultswerealsostudied.Methods:Twenty-twoMalayadults(10menand12women)andtwentyChineseparticipants(10menand10women)agedbetween20and49yearsparticipatedinthisstudy.ExtratympanicECochG(ET-ECochG)wasrecordedaccordingtostandardnon-invasiveprocedure.Summatingpotential(SP)amplitude,actionpotential(AP)amplitudeandSP/APratiowereanalyzedaccordingly.Results:ET-ECochGresultswerefoundtobecomparablebetweenleftandrightears(p>0.05).NonotabledifferencesinET-ECochGresultswerefoundbetweenMalayandChinesegroups(p>0.05).NosignificantinfluenceofgenderonET-ECochGoutcomeswasalsonoted(p>0.05).ThederivednormativedataforAsianadults(84ears)areconsistentwithpreviousreports.Conclusion:ThepresentstudyprovidespreliminarynormativedataforET-ECochGamongAsianadults.TheECochGcomponentsdonotappeartobeinfluencedbyeitherethnicityorgender.ThederivednormativedatacanbeusedforclinicalapplicationsandasthereferenceforfuturestudiesinvolvingAsianpopulation.

简介：Nowadays,numerouscommercialelectrocardiographs(ECG)have500Hzoutputsamplingrate,i.e.,2mscorrespondingsamplinginterval.Medicalworkerswhohavenobackgroundofsignalprocessingmayworryaboutwhethersuchlow500Hzoutputsamplingratedatacouldsupporthigh-precisionestimationofelectrocardiogramparametersbybeingup-sampled.Withintentiontoclarifytheproblemtothemedicalworkers,thispapertakessomesimulatingexperimenttoillustrateit.TheexperimentchosetheRRintervalandRpeakamplitudeasrepresentativeparameterstobeestimated.Theobtainedresultswereasfollows:forRRintervalparameter,itsestimationerrorcanbeloweredtobelow0.3msbyup-sampling;forRpeakamplitude,itsestimationerrorcanbereducedtobelow2.0μVbyup-sampling.ItisbelievedthatotherECGparameterestimationcanalsobeimprovedsimilarlybyup-sampling500Hzdata.

简介：AIMTo分析在眼睛的biomechanical和眼睛的生物测定的数据之间的关联，在健康subjects.METHODSThree上由基于Scheimpflug的设备测量了连续大小用角膜的可视化Scheimpflug技术(CorVis圣)被执行健康眼睛上的设备和10个设备特定的参数被记录。Pentacam导出HR的参数(前面、以后的表面上的角膜的弯曲半径；顶端的pachymetry；角膜的体积；角膜的错误数据；前面的房间的深度，体积和角度)并且从IOLMaster的轴的长度(AL)与10特定的CorVis圣parameters.RESULTSMeasurements被相关在43个志愿者的43只眼睛被进行(年龄61.24楴湯污?H

简介：Computedtomography（CT）playsanimportantroleinthefieldofmodernmedicalimaging.Reducingradiationexposuredosewithoutsignificantlydecreasingimage＇squalityisalwaysacrucialissue.Inspiredbytheoutstandingperformanceoftotalvariation（TV）techniqueinCTimagereconstruction,aTVregularizationbasedBayesian-MAP（MAP-TV）isproposedtoreconstructthecaseofsparseviewprojectionandlimitedanglerangeimaging.Thismethodcansuppressthestreakartifactsandgeometricaldeformationwhilepreservingimageedges.Weusedorderedsubset（OS）techniquetoacceleratethereconstructionspeed.NumericalresultsshowthatMAP-TVisabletoreconstructaphantomwithbettervisualperformanceandquantitativeevaluationthanclassicalFBP,MLEMandquadratepriortoMAPalgorithms.Theproposedalgorithmcanbegeneralizedtocone-beamCTimagereconstruction.

简介：BackgroundChronickidneydisease(CKD)patientsareathighriskofatherosclerosis.Structuralandelasticchangesofcarotidarterywallreflecttherangeanddegreeofatherosclerosisinperipheralarteries,whichcanbeacquiredbyultrasoundradiofrequency-datatechniqueautomaticallyandprecisely.MethodsAtotalof66CKDpatientswithnegativeresultsonroutinecarotidarteryultrasoundexaminationwereenrolled,and30healthyphysicalexamineeswereselectedascontrols.Patientsweredividedinto3groupsaccordingtoCKDstage:stage1-2,stage3-4andstage5.Clinicalcharacteristicsandthelaboratoryresultswereacquired.Intima-mediathickness(IMT)andcompliancecoefficient(CC)ofcommoncarotidarteryweremeasuredbyultrasoundradiofrequencydatatechnique(QIMTandQAS).PredictorsofIMTandCCwereanalyzedrespectively.ResultsAmongthe66patients,15wereonstage1-2,15onstage3-4and36onstage5accordingtoeGFR.ThecommoncarotidarteryIMT(CCIMT)ofalltheCKDgroupsexceptpatientsonstage1-2wassignificantlyincreasedwhencomparedwithcontrols.TheCCofcarotidarterysignificantlywasdecreasedineveryCKDgroupcomparedwithcontrols.AgeandCKDstageweresignificantpredictorsofCCIMTandCCinCKDpatients(P<0.05).AgingandadvancedCKDstagewereassociatedwithincreasedCCIMT(OR=4.855and4.969)anddecreasedCC(OR=32.178and14.068).ConclusionsRadiofrequency-datatechniquecandetectthesmallchangesofstructureandelasticityofcarotidarterywallinCKDpatients.CKDpatientshaveincreasedIMTanddecreasedelasticityofcarotidarterycomparedwithhealthysubjects.AgingandadvancedCKDstageareassociatedwithincreasedCCIMTanddecreasedCC.