简介:AbstractThe aim of this paper is to discuss the risk of recurrence in patients with differentiated thyroid cancer and emphasize the importance of risk-group stratification, early recurrence identification and application of new imaging modalities, what is the PET-CT. Moreover, follow-up of patients with thyroid carcinoma should be carried out by specialized teams throughout life. Therefore, interdisciplinary case discussions in tumor conferences may improve the use of multimodal therapy especially in patients with poorly differentiated thyroid carcinomas. After baseline follow-up, if there is a suspicion of thyroid carcinoma, early PET-CT should be used for early detection and appropriate planning. Fortunately, due to the good localization possibility, the PET-CT enables a focused surgical procedure with avoidance of an unnecessary tumor search and thereby a reduction of the risk of injury of neighboring structures which is a concern with reoperative neck surgery.
简介:Ensuringahighmanufacturingtestqualityofanintegratedelectroniccircuitmandatestheapplicationofalargevolumetestset.Evenifthetestdatacanbefitintothememoryofanexternaltester,theconsequentincreaseintestapplicationtimereflectsintoelevatedproductioncosts.Testdatacompressionsolutionshavebeenproposedtoaddressthetesttimeanddatavolumeproblembystoringanddeliveringthetestdatainacompressedformat,andsubsequentlybyexpandingthedataon-chip.Inthispaper,weproposeascancellpositioningmethodologythataccompaniesacompressiontechniqueinordertoboostthecompressionratio,andsquashthetestdataevenfurther.Whilewepresenttheapplicationoftheproposedapproachinconjunctionwiththefan-outbaseddecompressionarchitecture,thisapproachcanbeextendedforapplicationalongwithothercompressionsolutionsaswell.Theexperimentalresultsalsoconfirmthecompressionenhancementoftheproposedmethodology.
简介:Multi-beamSonarandSide-scanSonarcompensateeachother.Inordertofullyutilizeallinformation,itisnecessarytofusetwokindsofimageanddata.Andtheimageco-registrationisanimportantandcomplicatedjobbeforefusion.Thispapersuggestscombiningbathymetricdatawithintensityimage,obtainingthecharacteristicpointsthroughtheminimalanglesoflines,andthendecidingthecorrespondingimagepointsbythemaximalcorrelatecoefficientinsearchingspace.Finally,thesecondorderpolynomialisappliedtothedeformationmodel.Aftertheimageshavebeenco-registered,Waveletisusedtofusetheimages.Itisshownthatthisalgorithmcanbeusedintheflatseafloorortheisotropicseabed.Verificationismadeinthepaperwiththeobserveddata.
简介:目的:为了决定骨头扫描调查什么时候在无征状的人是适当的,与前列腺癌症诊断了。方法:在2005年11月和2006年7月之间,有前列腺癌症的317个人经历了骨头扫描研究;176个人完成了包括标准。象univariate一样并且多的前列腺特定的抗原(PSA)cut-offs逻辑回归用数字直肠的检查分析发现的变量,活体检视格利森分数和年龄被执行决定骨头扫描研究什么时候是可能的具有价值。结果:有浆液PSA≤的仅仅1/61人(1.6%)20ng/mL有积极骨头扫描。然而,有浆液PSA20.1的2/38人(4.7%)40.0ng/mL,有浆液PSA40.1的3/20人(15%)60.0ng/mL,有浆液PSA60.1的7/19人(36.8%)有浆液PSA>的100.0个ng/mL和19/38人(50%)100.0ng/mL有积极骨头扫描。Univariate并且多变量逻辑回归分析是在这些组的uninformative。结论:基于我们的调查结果,骨头扫描具有在介绍PSA≤的无征状的前列腺癌症病人的有限价值20ng/mL。因此,除非药品治疗被思考,这调查能被消除。而且,发现的数字直肠的检查,活体检视格利森分数和年龄在预言可能怀有骨头转移的那些是不起帮助作用的。
简介:Thispaperpresentsaflexibleandhighspeeddigitalscanconverter(DSC)withtheabilitytohandlehighfrequencyultrasoundimaginginreal-time.Thecharacteristicsinimagingsystemsuchasfocuslengthoftransducer,theswingradiusandsamplinglengthetc.couldbechangedeasilyincompliancewiththeresearcher'sapplicationbasedonthisflexibledigitalscanconverter.Linearinterpolationisemployedtoachievethecoordinatetransformationsalgorithm.Custom-builtsoftwareisprogrammedtopreliminarilyhandlethealgorithmaccordingtodifferentultrasoundimagingapplications.HighperformanceFPGAwillimplementhighspeedinterpolationcalculationbasedonthepreliminarydatawhicharestoredintheDDR2SDRAMfromthesoftware.64bit66MHzPCIisemployedtoaccomplishhighspeeddatatransmission.Experimenthasshownthatmorethan500frameratecouldbeachievedbasedonthishighspeeddigitalscanconverter.ThedesignedflexibleandhighspeeddigitalscanconvertercouldbeusedincurrentFPGAbasedhighfrequencyultrasoundimagingsystem.
简介:Anefficientdesign-for-testability(DFT)techniqueisproposedtoachievelowoverheadforscan-baseddelayfaulttesting.Existingtechniquesfordelaytestsuchasskewed-loadorbroadsidemakethetestgenerationprocesscomplexandproducelowercoverageforscan-baseddesignsascomparedwithnon-scandesigns,whereastechniquessuchasenhanced-scantestcanmakethetesteasybutneedanextraholdinglatchtoaddsubstantialhardwareoverhead.Anewtri-stateholdinglogicispresentedtoreplacethecommonholdinglatchinenhanced-scantesttogetasubstantiallowhardwareoverhead.Thisschemecanachievelowdelayoverheadbyavoidingtheholdinglatchonthecriticaltimingscanpath.What’smore,thismethodcanalsokeepthestateandsignalactivityinthecombinationalcircuitfromthescanduringdatascan-inoperationtoreducethepowerdissipation.ExperimentresultsonasetofISCAS89benchmarksshowtheefficiencyoftheproposedscheme.
简介:PhasescanapplicationisveryimportantsoftwareforADSLinacbeamtuning.Thescan/measuretoolsinOpenXALwasusedpreviously.Inordertoimprovethescanningefficiency,anewphasescanapplicationwasdeveloped.ThePythonwasselectedastheprogramminglanguagetomakethedevelopmenteasier.
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简介:代数课本中指出:“在a>0时,|x|>a(?)x<-a或x>a;|x|0”。其实,这一等价性在a≤0时也同样成立。现证明如下:①当a=0吋,i|x|>a即|x|>0的解集显然是:x<0或x>0即x<-a或x>a。
简介:Objective:TheobjectiveofthisstudywastoexaminetheeffectofhypothyroidismonhearingfunctioninpatientssurgicallytreatedfordifferentiatedthyroidcancerandsubsequentlyexperiencedhypothyroidismduringpreparationforfollowupI-131scintigraphyscanbyeitherrecombinanthumanthyroidstimulatinghormone(rhTSH)treatmentorthyroidhormonewithdrawal(THW).Methods:Atotalof55patientsundergoingI-131scintigraphyscanfollowingsurgeriesfordifferentiatedthyroidcancerwereincludedinthestudy,including25patientspreparedbyadministrationofrecombinantTSH(rhTSHGroup)and30patientsbythyroidhormonewithdrawal(THWGroup).Results:Airconductionthresholdsat1,2and4kHzforbothearswerehigherduringhypothyroidperiodthanduringeuthyroidperiodforpatientsintheTHWgroup(p<0.05)butnotforpatientsintherhTSHgroup.Conclusion:Sensorineuralhearinglosswasdetected,especiallyatlowfrequencies,inpatientswithDTCaftersurgicaltreatmentwhosehormonereplacementtherapywaswithdrawnbutnotinthosereceivingrhTSH.ItisthereforepreferredtouserhTSHwhenpreparingforI-131scintigraphyscaninpatientsatriskforhearingloss.
简介:Vestibularschwannoma(VS)isaslow-growingbenignneoplasm.TherehasbeenanevolutioninthemanagementofVSfromactivetreatments(microsurgeryandstereotacticradiotherapy)toconservativemanagement(waitandscan).RegularMRIscanningisnecessarytomonitortumorprogression.Conservativemanagementcausessignificantlylesscomplicationsandoffersahigherqualityoflifecomparedwithactivetreatments.ThemeangrowthrateofVSvariesfrom0.4to2.9mm/year,andspontaneousshrinkageisobservedin3.8percentoftumorsduringobservation.Ifsignificantgrowthoccurs,activetreatmentisconsidered.Significantgrowthisdefinedasanincreaseofatleast3mminthelargestextrameataldiameterinanyplanebetweenthefirstandlastavailablescans.Thevestibulocochlearnerveissurroundedbycerebrospinalfluid,whichprovidesnaturalcontrastforMRI;thus,gadoliniummaynotbeneededtodetectVS.Specificsequenceshavehighsensitivity,specificity,andaccuracyfordetectionofprogression.HypointensesignalintheipsilateralinnerearfluidmightbeausefulsigntodistinguishVSfrommeningioma.Inthispaper,wesummarizethecurrentstatusofresearchonconservativemanagementandnon-contrastMRIforthedetectionofVS.