简介：通过测试和分析此较SiO2·Al2O3·CaO·CaF2·P系统玻璃及其经酸处理前后的FTIR光谱,研究经酸处理前后玻璃结构变化.当玻璃组成中不含氟时,酸洗前后,其红外光谱形态几乎无变化,而当其组成中含氟时,最强谱带出现明显的分裂,且相对强度发生明显的改变,在～1086cm-1和～1024cm-1或～996cm-1处谱带的出现和相对强度的改变,表明在玻璃粉表面存在两相,即纯硅酸盐相和铝硅酸盐相,酸洗使玻璃颗粒表面形成不完全的硅凝胶包裹层,表明玻璃组成中含氟时,玻璃结构分相形成易于酸析相和不易酸析相.

简介：Interactivepickingisafundamentaltaskforprocessingdigitalgraphicsandimages.Combiningtwo-dimensional(2D)andthree-dimensional(3D)viewsisanimportanttrendinprocessingmedicalsliced-geometries.Withthegoalofaccuratelypickingpointsinsliced-geometries,wepresentamethodtopickpointsinteractivelybycombining2Dand3Dviewsofsliced-geometries.Fourviewwindowsareconstructedtorendersliced-geometriesusingmedicalimaginginteractiontoolkit(MITK):threefor2DslicesparalleltotheXY,YZ,andXZplanesandoneforsurfacerendering.Pointspickedinaviewwindowcanberenderedandmodifiedinanywindow.Afterapointispicked,itisimmediatelyconvertedintoaworldcoordinateandstored.Pointsareonlyrenderedandmodifiedbasedontheirworldcoordinates.Thispickingmethodcanbeusedforfitting,observing,andmeasuringlocalregions.Thismethodcanalsobeusedforinteractivesegments.Ourexperimentshowsthatthepickingmethodisaccurateandhasareal-timepickingeffect.

简介：随着现代医学的不断发展,监护仪已广泛应用于医院的重症监护病房（intensivecareunit,ICU）、心脏监护病房（cardiaccareunit,CCU）、麻醉手术室及各临床科室,特别是它可向医护人员提供患者生命体征的重要信息。利用这些信息,临床医生能更好地分析患者病情,从而采取适当的治疗措施,获得最佳治疗效果,因此监护仪的作用越来越受到重视。

简介：Totesttheaccuracyofanewfingerprintscanner,researcherstypicallyrunmillionsofknownfingerprintimagesthroughthesystem'smatchingsoftware.Butthistestingprocedurecan'tquitemimicrealoperatingconditions,asa2-Dimagefedintoaprogramisfundamentallydifferentthana3-Dfingerpressedtoasensor.

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简介：Inrecentyears,thevolumetricapproachof3Dreconstructionhasemergedasapowerfulclinicmethodforbiomedicalapplications.Thisapproachisbasedonavoxelrepresentedobjectwhichmaintainsmanydetailsofthesurfaceandtheinternalcon-structuresoftheoriginalbody.Becauseofahugeamountofdata,thevolumedatasettakesalargesizeofmemory,andahighprocessingspeedisrequiredinorderto

简介：Inordertoeliminatedisplacementandelasticdeformationbetweenimagesofadjacentframesincourseof3Dultrasonicimagereconstruction,elasticregistrationbasedonskeletonfeaturewasadoptinthispaper.Anewautomaticallyskeletontrackingextractalgorithmispresented,whichcanextractconnectedskeletontoexpressfigurefeature.Featurepointsofconnectedskeletonareextractedautomaticallybyaccountingtopicalcurvatureextremepointsseveraltimes.Initialregistrationisprocessedaccordingtobarycenterofskeleton.Whereafter,elasticregistrationbasedonradialbasisfunctionareprocessedaccordingtofeaturepointsofskeleton.Resultofexampledemonstratethataccordingtotraditionalrigidregistration,elasticregistrationbasedonskeletonfeatureretainnaturaldifferenceinshapefororgan'sdifferentpart,andeliminateslightelasticdeformationbetweenframescausedbyimageobtainedprocesssimultaneously.Thisalgorithmhasahighpracticalvalueforimageregistrationincourseof3Dultrasoundimagereconstruction.

简介：在生物医学的图象数据的显示，操作和分析的进程，他们通常需要通过插值的进程被变换成各向同性的discretization的数据，当立方的卷绕旋转插值广泛地由于它在计算费用和精确性之间的好折衷被使用时。在这份报纸，我们在场为3D的一个整个概念医药图象插值基于立方的卷绕旋转，和六个方法与不同锋利的控制参数，它在细节被提出。而且，我们也与不同的片间距用数据集合为这些方法给客观比较。在这些数据集合的每片被每个插值方法并且与原来的片相比用三项措施估计：摆平平均数的差别，争论的地点的数字，和最大的差别。根据试验性的结果，我们在场为3D的一个建议在不同状况下面的医药图象最后。

简介：据JohnsonBN2015年9月18日（AdvancedFunctionalMaterials,2015.doi：10.1002/adfm.2015017.）报道,美国明尼苏达大学、普林斯顿大学研究人员发现3D打印技术或许有助于神经系统修复。神经系统疾病一直是困扰着医学工作者的一个难题。其中神经元的损伤是导致神经系统疾病的重要诱因。因此,如果要治疗这些疾病,如何修复受损神经元就成为了摆在科学家面前的头号难题。一直以来,人们都在寻找有效方法来促使受损神经元再生。研究人员在小鼠实验中证实了这一想法。利用3D扫描获得了小鼠坐骨神经的轮廓,然后再利用3D打印技术打造出了一个内含能够促进神经元再生化学成分的硅酮类支架。

简介：Curcumin,adietaryphytochemical,exhibitsmultifunctionalnaturalproductwithregulatoryeffectsoninflammation.However,thepoorbioavailabilitylimitsitsclinicalapplications.Thus,wedesignedandsynthesizedanovelmonocarbonylanalogueofcurcuminB7andtheirinhibitionagainstmonocytechemotacticprotein-1（MCP-1）andinterleukin-8（IL-8）releasewasevaluatedinH2O2-stimulatedhumanvascularendothelialcells（ECs）inadose-responsivemanner,whileexhibitingnocytotoxicityinECs.Takentogether,theseinsightsonthenovelcompoundB7mayserveaspotentialagentsforthetreatmentofatherosclerosis.

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简介：目的采用STAR踝关节假体进行大骨节病的终末治疗方法,探讨其疗效.方法2年间对3例5踝大骨节病进行全踝置换术,按McGure踝关节评分系统分别对术前、术后患者疼痛程度、踝关节功能、踝关节活动度进行综合评分.结果随访最长1.5年,最短6个月,该3例患者术后按McGuire评分,3踝优,2踝良,1例患者伤口延迟愈合,随访1.5年,未发现假体松动或下沉.结论全踝关节置换术可有效缓解踝关节疼痛、改善关节活动度,是治疗大骨节病的终末有效手段.

简介：MatthiasLtitolfandhisPhDstudent,twoscientistsattheEPFL＇sInstituteofBioengineering,havedevelopedanewtechniqueforusinglaserstocarvepathwaysinhydrogelscaffoldsina3Dcellcultureenvironmenttocontrolthegrowthoftheculture.

简介：Segmentingwholeheartfromcardiaccomputedtomography(CTimagescanprovideanimportantbasisfortheevaluationofcardiacfunctionandhelpimprovetheaccuracyofclinicaldiagnosis.Manualsegmentationisthemostaccuratemethodforcardiacsegmentation.Butitistimeconsumingandnotsufficientlyreproducible.However,cliniciansstillrelyonthismethodinpracticalapplications.Soafullyautomaticmethodisneededtoimprovethesegmentationefficiency.Thispapeproposesaregistration-basedautomaticapproachforthree-dimensional(3DsegmentationofcardiacCTimages.TheproposedmethodutilizesthesimilarityocardiacCTimagesbetweendifferentindividuals,andusesregistrationtoachievethesegmentation.Affinetransformationisfirstlyimplementedtoachieveglobalcoarseregistration.Then,cubicB-splinesareusedtorefinethelocaldetailsinlocallyaccurateregistration.Mutualinformation(Ml)isusedasthesimilaritymeasure,andadaptivestochasticgradientdescent(ASGD)astheoptimizationalgorithm.Oumethodisappliedtothedual-sourcecardiacCTimagestosegmentwholeheartExperimentalresultsshowthattheproposedmethodcanautomaticallysegmentwholeheartfromcardiacCTimages.

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简介：Detrendedfluctuationanalysis(DFA)isfitforstudiesonthelong-rangeexponentialcorrelationofnon-stationarytimeserial.Inthispaper,inordertofindahypoxiaadaptabilityevaluationcriterion,theheartrateandSaO2signalsareanalyzedbythismethod.Thedemarcateexponentaboutfit-good-groupandfit-bad-groupinhypoxiaandnormalairarecalculatedandcompared.Theresultshowsαisdifferentindifferentsituation,theαinhypoxiaismuchhigherthanαofbreathinnormalair.Andαoffit-good-groupishigherthanfit-bad-group.ItshowsthatDFAcouldbeagoodcriteriontoanalyzehypoxiaadaptability,whichisusefulintheanalysisofhypoxiaphysiologysignal.

简介：Thispaperproposesapracticalalgorithmsofplanecutting,stereoclippingandarbitrarycuttingfor3Dsurfacemodelreconstructedfrommedicalimages.Inplanecuttingandstereoclippingalgorithms,the3Dmodeliscutbyplaneorpolyhedron.Listsofedgeandvertexineverycutplaneareestablished.Fromtheseliststheboundarycontoursarecreatedandtheirrelationshipofembraceisascertained.TheregionclosedbythecontoursistriangulatedusingDelaunaytriangulationalgorithm.Arbitrarycuttingoperationcreatescuttingcurveinteractively.Thecutmodelstillmaintainsitscorrecttopologystructure.Withtheseoperations,tissuesinsidecanbeobservedeasilyanditcanaiddoctorstodiagnose.Themethodscanalsobeusedinsurgeryplanningofradiotherapy.

简介：现将我院收治2例静脉滴注环丙沙星致过敏反应的体会报告如下。1资料1.1女,62岁,因肺癌住院。入院术后第一天查体:T36.8℃,胸腔引流通畅,刀口无渗出、渗血,右肺呼吸音尚可,患者尿量较少,约600毫升/每日。医嘱:5％GNS500ml+血速宁2.0g,（?）drip;环丙沙星注射液批号:（980511）100ml×0.2（?）dripbid;5％葡萄糖注射液500ml,维生素C2.0g,维生素B60.2g,⑦dripq.d,等。先滴注环丙沙星注射液100ml,

简介：比较双链腺相关病毒（Double－strandedadeno－associatedvirus，dsAAV）及单链AAV（Single－strandedadeno－associatedvirus，ssAAV）介导Exendin－4分泌表达效率。应用基因工程方法构建dsAAV／pSSHG／Exendin－4，与重组ssAAV比较转染NIH3T3细胞效率及转染后细胞上清Exendin－4浓度，免疫组化检测Exendin－4表达。经限制性内切酶及测序证实载体构建成功，测定重组dsAAVpSSHG／Exendin－4滴度为2．5＆#215;1011pfu，较重组ssAA滴度高（2．5×109pfu）；dsAAV／pSSHG／GFP转染NIH3T3细胞表达绿色荧光强；ELISA法检测感染重组dsAAV的NIH3T3细胞上清中Exendin－4的浓度为181．1±8．75pmol／ml，较重组ssAAV分泌浓度（133．81±8．09pmol／ml）升高（P＜0．05）；重组dsAAV及ssAAV转染NIH3T3细胞Exendin－4表达均为阳性。重组dsAAV可分泌表达Exendin－4并较ssAAV具有更高效转染能力，为研究Exendin－4功能及应用于临床打下基础。

简介：客观:测量基于空间邻近的图象和相互的信息的类似原则调查一个4D-CT重建方法的可行性。方法:驾驶正弦曲线运动站台在房子里做了的一台马达被用来创造沿着CT睡椅的纵的轴的一个维的期刊运动。正弦曲线运动的振幅被设为一个振幅吗？