简介:Overthedecade,ChineseBiomedicalEngineeringhasmaderemarkleprogressandaccumulatedmuchexperience.Animportantproblemfacingusishowtotaketheroadaheadofus.Firstofall,weshouldchangeourconventionalconceptandheadforthenewroad.Aboutthreeyearsago,wemadeaspecialreviewontheconnotationandchar-acteristicsofbiomedicalengineeringandpointedoutthatBiomedicalEngineeringwas
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简介:Theapplicationofhumanhomografthasbeenpopularincardiovascularsurgeryandshownperfecteffects.Butthedifficultytogetgraftgreatlylimiteditsclinicalap-plication.Thethawedhomograftcannotbeusedinsomecasessinceitisnotclearwhetheritcanbere-cryopreservedwithoutdamage.Weconductedthepresentstudytoknowthechangesinviabilityofthehomograftafterrefreezinginsixhumanpul-
简介:PACScanbeappliedinthenetworkarchitectureofClient/Server(C/S)andBrowser/Server(B/S)incurrentapplicationofhospitalinformationsystem.PACSViewerofB/Smodelisrealizedbymeansofthebrowsercommonly,butwebbrowserdoesnotsupportDICOMstandard.Inthisarticle,howtouseJavaApplettorealizethedisplayandoperationsofDICOMimageswillbediscussed.ThelightweightmethodtoviewDICOMimagesisveryfitfortelemedicaltreatment,andthesituationsnotrequirestrongabilityinimageoperations。
简介:Osteoblastsofratculturedinvitrowerestimulatedwithpulsed50Hzelectromagneticfieldandbasicfibroblastgrowthfactor(bFGF).TheMTTmethod,flowcytometryandhistochemistrystainingwereusedtodetectcellproliferation,cellcycleandalkalinephosphatase.Theresultsindicated:afterstimulatedby1mTelectromagneticfield,thecellsaremoreabundant,havemoreSphasepercentages,2mTelectromagneticfieldhavenoevidenteffectoncells'growth;comparedwithelectromagneticfield,thecellsstimulatedbybFGFaremoreabundantandhavelargerSphaseratios.ElectromagneticfieldandbFGFhavenoeffectoncells,alkalinephosphatase.Therefore,weconcludedthatelectromagneticfieldcanenhanceosteoblastsgrowthlikesomegrowthfactorsuchasbasicfibroblastgrowthfactor,andtheosteoblasts',characteristicswasnotchanged.
简介:目的探讨3D打印个体化手术治疗方案在骨盆骨折中的临床疗效。方法收集南京医科大学第二附属医院骨盆骨折的患者22例,随机分为3D组和对照组,3D组病例采用3D打印技术建模,术前模拟手术,定制个体化解剖钢板后进行手术治疗,对照组常规手术治疗,所有病例记录手术所用时间、出血量和内固定物的长度、弧度、螺钉数量和方向,术后应用Matta评分评估疗效,比较两组病例手术时间、术中出血量的差异。结果所有病例术后随访2~8月,Mata评估标准均为优,3D组手术时间为(60±12)min,较对照组明显缩短,术中出血量为(218±63)mL,较对照组明显减少,手术入路与术前设计一致,内固定位置与术前手术方案设计完全一致。结论3D打印个体化治疗方案治疗骨盆骨折,可以给每一位骨盆骨折患者设计个体化解剖形内固定物,制定个性化手术方案,并且具有减少手术创伤、缩短手术时间、降低手术难度等优势,临床疗效满意,值得推广。
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:Inthisarticle,wepresentanalternativederivationforBronnikov’sreconstructionalgorithminX-rayphasecontrasttomographywithholographicmeasurements.Atwo-stepmethodwasusedinthealternativederivation.ThephaseshiftinducedbytheobjectwasobtainedbyFouriertransformandtherealpartofthecomplexrefractiveindexoftheobjectwasretrievedbyapplyingtheconventionalfilteredbackprojectionmethod.Thealternativederivationprovidesaneasierwaytounderstandthereconstructionformula.
简介:THEAPPLIEDSTUDYOFTHETOTALHIPREPLACEMENTFORTHEADULT'SCONGENITALDISLOCATIONOFTHEHIPATTHEPRIMARYACETABULUMTHEAPPLIEDSTUDYOFTHETO...
简介:目的评价3.0T时间飞跃法磁共振血管成像(3.0T3D-TOFMRA)对颅内动脉瘤的诊断价值。方法选择25例有颅内动脉瘤相关症状患者,其中男性14例,女性11例:年龄25-74岁,平均年龄57岁。对其3.0T3D-TOFMRA诊断为颅内动脉瘤患者的磁共振资料进行回顾性分析。并与数字减影血管造影(DSA)对照。结果3.OT3D-TOFMRA共显示28个动脉瘤,其中单发22例,3例为多发动脉瘤,起自颈内动脉系统25个;起自基底动脉系统3个;DSA检查共显示27个动脉瘤.结论3.0T3D-TOFMRA虽然对于直径≤3mm的微小动脉瘤的诊断存在一定的误诊及漏诊率.但其诊断颅内动脉瘤时能比较全面地显示动脉瘤.三维信息对临床确立治疗方案有很大帮助。3.OT3D-TOFMRA不失为高危人群或临床怀疑颅内动脉瘤患者筛查及随诊观察的有效手段。
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。