简介:基于CT图像数据结合图像处理软件建立人体下颈椎C3-C7活动节段的三维有限元模型,并验证模型的有效性。选取一名健康志愿者颈椎CT数据,建立包括椎体、后部结构、终板、椎间盘、韧带和关节突等部分的下颈椎C3-C7三维有限元模型,赋予颈椎组织不同成分的材料属性,模拟人体颈椎在正常生理状态下承受扭矩载荷时,前屈、后伸、侧弯和旋转等运动情况下颈椎椎体、椎间盘和小关节的生物力学特性。颈椎C3-C7活动节段在四种工况下的活动范围与前人离体实验和有限元分析的研究结果基本吻合,颈椎椎体、椎间盘和小关节的应力分布符合其生物力学特性。下颈椎C3-C7活动节段的模拟结果符合人体的真实运动规律,为临床颈椎的生理、病理研究以及植入器械的力学性能分析奠定理论基础。
简介:Gliomahasthehighestincidenceinthebraintumors.Thoughtreatedwithsurgicalresection,externalbeamradiationtherapy,andsystemicchemotherapy,patientswithgliomahavepoorprognosisbecauseofgliomarecurrence.
简介:目的探讨采用微创内外侧切口双钢板内固定治疗C3型股骨远端骨折的临床疗效.方法对2009年3月~2012年12月采用微创内外侧切口双钢板内固定治疗C3型股骨远端骨折25例患者进行回顾性分析,包括记录手术时间,术中出血量,手术并发症,骨折愈合时间,内固定失效,及末次随访膝关节功能.结果手术时间110~150分钟,平均125分钟;术中出血量400~600ml,平均480ml.术后伤口无感染、皮肤坏死发生,均Ⅰ期愈合.25例均获得随访,随访时间12~36个月,平均25个月.X线显示平均术后6个月骨折愈合,无内固定物断裂及松动事件发生.22例患者达到骨折解剖复位.患者末次随访时,2例开放性骨缺损患者关节僵硬(0~50°),其他患者膝关节平均活动范围为2~120°.膝关节功能采用美国特种外科医院膝关节评分标准,优9例,良11例,可3例,差2例,优良率80%.结论采用微创内外侧切口双钢板内固定治疗股骨远端C3型骨折,能较好的暴露骨折,达到骨折内固定的坚强固定,满足早期功能锻炼的要求.微创操作减少了软组织并发症,利于骨折愈合.
简介:目的观察应用掌侧扩大桡侧腕屈肌(FCR)入路切开复位内固定术治疗C3型桡骨远端骨折的疗效。方法选取本院2015年1月~2015年12月收治的C3型桡骨远端骨折患者52例,其中女41例,男11例,年龄19~68岁,平均(49.74±4.93)岁。应用掌侧扩大FCR入路切开复位锁定钢板内固定术治疗患者,随访观察骨折愈合时间,腕关节功能及并发症发生情况。结果52例患者中50例得到有效随访,随访时间为3~6个月。所有骨折患者均获得骨性愈合,按照Gartland-Weriey腕关节功能评价标准进行功能评价,优16例,良28例,可4例,差2例,优良率89.00%,并发症发生率为8.00%;手术后,患者桡骨茎突长度、尺偏角、掌倾角和掌侧成角均优于手术前[(11.13±2.27)mmvs(7.02±2.85)mm,(22.56±2.65)°vs(16.94±4.71)°,(10.33±6.68)°vs(-17.02±9.75)°,(1.68±2.33)°vs(20.42±6.94)°],差异均具有统计学意义(〈0.01)。结论掌侧扩大FCR入路切开复位内固定术是治疗C3型桡骨远端骨折的有效方法,疗效显著,值得推广和应用。
简介:Overthedecade,ChineseBiomedicalEngineeringhasmaderemarkleprogressandaccumulatedmuchexperience.Animportantproblemfacingusishowtotaketheroadaheadofus.Firstofall,weshouldchangeourconventionalconceptandheadforthenewroad.Aboutthreeyearsago,wemadeaspecialreviewontheconnotationandchar-acteristicsofbiomedicalengineeringandpointedoutthatBiomedicalEngineeringwas
简介:目的探讨不同模拟体液对HA涂层体外生物学行为的影响.方法采用等离子体喷涂法,在碳/碳复合材料表面制备HA涂层,并对涂层进行了热处理.利用X射线衍射仪(X-raydiffraction)、扫描电子显微镜(Scanningelectronmicroscopy)等检测手段,分析该涂层的物相和形貌,观察HA涂层在模拟体液中的影响.结果XRD检测结果表明,在模拟体液浸泡过程中,涂层的主要组成相的相对含量和结晶度不断发生变化.由SEM分析结果可知,在浸泡过程中,内送粉方式下制得的HA涂层的表面沉积物呈现近似网状的结构.同时,在Ringer溶液中,可以观察到HA涂层溶解痕迹.结论通过适当的热处理可以恢复HA的结构完整性,同时提高涂层的结晶度.
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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: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...