学科分类
/ 1
3 个结果
  • 简介:AIM:Toinvestigatethediffusioncharacteristicsofwaterofopticnerveandopticradiationinhealthyadultsanditsrelatedfactorsbydiffusiontensorimaging(DTI)at3T.METHODS:Atotalof107healthyvolunteersperformedheadconventionalMRIandbilateralopticnerveandopticradiationDTI.TheprimarydataofDTIwasprocessedbypost-processingsoftwareofDTIstudio2.3,obtainingfractionalanisotropyvalue,meandiffusivityvalue,principalenginevalue,orthogonalenginevaluebymeasuring,andanalyzedbytheSPSS13.0statisticalsoftware.RESULTS:Thebilateralopticnerveandopticradiationfiberspresentedgreencolorindirectionalencodedcolor(DEC)mapsandpresentedhighsignalinfractionalanisotropy(FA)maps.TheFAvalueoftheleftopticnervewas0.598±0.069andtherightwas0.593±0.065;themeandiffusivity(MD)valueoftheleftopticnervewas(1.324±0.349)×10-3mm2/sandtherightwas(1.312±0.350)x10-3mm2/s;theprincipalenginevalue(λ?)oftheleftopticnervewas(2.297±0.522)×10-4mm2/sandtherightwas(2.277±0.526)×10-3mm2/s;theorthogonalenginevalue(λ⊥)oftheleftopticnervewas(0.838±0.285)×10-3mm2/sandtherightwas(0.830±0.280)×10-3mm2/s;theFAvalueoftheleftopticradiationwas0.636±0.057andtherightwas0.628±0.056;themeandiffusivity(MD)valueoftheleftopticradiationwas(0.907±0.103)×10-3mm2/sandtherightwas(0.889±0.125)×10-3mm2/s;theprincipaleigenvalue(λⅡ)oftheleftopticradiationwas(1.655±0.210)×10-3mm2/sandtherightwas(1.614±0.171)×10-3mn2/s;theorthogonalenginvalue(λ⊥)oftheleftopticradiationwas(0.531±0.103)×10-3mm2/sandtherightwas(0.524±0.152)×10-3m

  • 标签: magnetic resonance IMAGING diffusion TENSOR IMAGING
  • 简介:AIM:Toevaluatetheepidemiologic,anatomic,andclinicalfeaturesofopenglobeinjuriesinchildren.METHODS:Themedicalfilesofpatientsundertheageof16whohadbeenoperatedforanopenglobeinjuryatAkdenizUniversityHospital’sDepartmentofOphthalmologywereretrospectivelyevaluated.RESULTS:Atotalof90patientswereevaluatedinthisstudy.Amongthesepatients,26(28.9%)werefemaleand64(71.1%)weremale.Themeanageofthepatientswas7.7±4.2years.Themale/femaleratiowasobservedtoincreasewithincreasingage(P=0.006,P=7.48).Injuriesweremostlikelytooccurinspringandautumn(P=0.028).Thetimeintervalbetweentheinjuryandthesurgicalrepairwas9.36±27.4h.Forty(44.4%)oftheinjuriesoccurredinthehome,27(30%)occurredintheyard,and21(23.3%)happenedwhileplayinginthestreet.Themostcommoncausesofinjuryweresharpmetalobjects(P<0.001).Injurytothecorneaoccurredin47(52.2%)ofthepatients(P<0.001).Themostcommoncomplicationtooccurwascataractformation.Additionaloperationswerenecessaryfor37(41.1%)ofthepatients.Thefinalvisualacuitywascorrelatedwithboththeinitialvisualacuityofthewoundedeyepriortosurgeryandthelengthofthewound(P<0.001,r=0.502andP<0.001,r=-0.442,respectively).CONCLUSION:Openglobeinjuriesthataresufferedinchildhoodgenerallyoccureitherathome,intheyard,oronthestreet,withsharpmetalobjectsbeingthemostcommoncauseofinjury.Theinitialvisualacuityandthelengthofthewoundarethemostimportantdeterminantsofthefinalvisualacuity.

  • 标签: CHILDHOOD EPIDEMIOLOGY open globe INJURY PREVENTION
  • 简介:目的比较急性中心性浆液性脉络膜视网膜病变(CSC)的患侧与对侧眼视网膜频域相干光断层扫描(OCT)的图像特征。方法应用频域OCT对30例(60眼)单眼发病急性CSC患者患侧和对侧眼的黄斑部视网膜显微结构进行检测,比较患侧组与对侧组黄斑中心凹外核层厚度、光感受器层(IS/OS层)、视网膜色素上皮(RPE)形态差异。结果所有30例患者患侧眼均有不同程度黄斑部视网膜浆液性脱离,对侧眼中有4眼(13.3%)存在轻度视网膜浆液性脱离;患侧组黄斑中心凹外核层厚度均值为(95.32±24.87)μm,对侧组为(98.80±14.36)μm,两组差异无统计意义(t=1.627,P=0.110)。患侧组中IS/OS层厚度均匀一致者12眼(40.0%),对侧组20眼(66.7%);患侧组IS/OS层厚度均匀一致伴内外节缺损、不均、凸起增厚者共18眼(60.O%),对侧组共10眼(33.3%),差异有统计意义(X2=4.28,P=0.038)。患侧组中出现RPE异常者有24眼(80.0%),对侧组中有8眼(26.7%),差异有统计意义(x。=17.143,P=0.000)。结论频域OCT能清晰显示急性CSC患者的细微病理结构改变,单眼发病CSC患者中一部分对侧眼存在IS/OS层和RPE异常,但是其发生率较患侧眼低。(中国眼耳鼻喉科杂志,2013,13:165—167)

  • 标签: 相干光断层扫描 脉络膜视网膜病变 急性 浆液性 对侧眼