简介:摘要目的探讨分析在脑导水管梗阻临床诊断中磁共振3D-CISS序列应用价值。方法选取2011年7月-2014年4月我院所收治的55例脑导水管梗阻患者,借助于3.0T超导MR扫描仪实施3D-CISS、FLASHT1WI以及TSET2WI序列扫描,同时对磁共振3D-CISS序列原始图像实施重建,就三种序列脑导水管病变显示情况进行观察比较。结果3D-CISS、FLASHT1WI以及TSET2WI三种序列在脑导水管梗阻病变显示率上各为100%、72.7%、16.4%,经统计学处理分析,差异明显有统计学意义(P<0.05)。结论从本次研究结果来看,相对于常规序列而言,在脑导水管梗阻病变的显示上,磁共振3D-CISS所存优势明显,若条件允许可优先选用这种序列进行检查诊断。
简介:目的探讨术前三维稳态构成干扰(3D-CISS)序列和三维时间飞跃(3D-TOF)序列MRI在原发性三叉神经痛责任血管判断中价值。方法回顾性分析2016年1~12月首次行微血管减压术(MVD)治疗的79例原发性三叉神经痛的临床资料。术前均行3D-CISS和3D-TOF序列MRI检查。以术中发现为判断责任血管的标准。结果术中发现单一责任血管56例(70.8%),2支及以上责任血管19例(24.1%),无责任血管4例(5.1%);责任血管中包含至少一条动脉73例(92.4%),单纯静脉2例(2.5%)。术前影像学检查阳性75例,阴性4例。75例阳性中,术中发现责任血管73例,未发现责任血管2例;4例阴性中,术中发现责任血管2例,2例未发现责任血管。术前3D-CISS和3D-TOF序列MRI判断责任血管的灵敏性为97.3%(73/75),特异性为50.0%(2/4),准确率为94.9%[(73+2)/79];判断责任血管包含动脉的灵敏性为98.6%(72/73),特异性为50.0%(3/6),准确率为94.9%[(72+3)/79]。结论术前3D-CISS联合3D-TOF序列MRI可用于判断原发性三叉神经痛责任血管,尤其对于包含动脉的责任病变,准确率较高,为MVD提供参考信息。
简介:X-rayimagingistheconventionalmethodfordiagnosingtheorthopedicconditionofapatient.ComputerizedTomography(CT)scanningisanotherdiagnosticmethodthatprovidespatient’s3Danatomicalinformation.However,bothmethodshavelimitationswhendiagnosingthewholeleg;X-rayimagingdoesnotprovide3Dinformation,andnormalCTscanningcannotbeperformedwithastandingposture.Obtaining3Ddataregardingthewholeleginastandingpostureisclinicallyimportantbecauseitenables3Danalysisintheweightbearingcondition.Basedontheseclinicalneeds,ahardware-basedbi-planeX-rayimagingsystemhasbeendeveloped;itusestwoorthogonalX-rayimages.However,suchmethodshavenotbeenmadeavailableingeneralclinicsbecauseofthehightcost.Therefore,weproposedawidelyadaptivemethodfor2DX-rayimageand3DCTscandata.Bythismethod,itispossibletothreedimensionallyanalyzethewholeleginstandingposture.TheoptimalpositionthatgeneratesthemostsimilarimageisthecapturedX-rayimage.Thealgorithmverifiesthesimilarityusingtheperformanceoftheproposedmethodbysimulation-basedexperiments.Then,weanalyzedtheinternal-externalrotationangleofthefemurusingrealpatientdata.Approximately10.55degreesofinternalrotationswerefoundrelativetothedefinedanterior-posteriordirection.Inthispaper,wepresentausefulregistrationmethodusingtheconventionalX-rayimageand3DCTscandatatoanalyzethewholelegintheweight-bearingcondition.
简介:Circulargenomes,beingthelargestproportionofsequencedgenomes,playanimportantroleingenomeanalysis.However,traditional2Dcircularmaponlyprovidesanoverviewandannotationsofgenomebutdoesnotofferfeature-basedcomparison.Forremedyingtheseshortcomings,wedeveloped3DGenomeTuner,ahybridofcircularmapandcomparativemaptools.Itscapabilityofviewingcomparisonsbetweenmultiplecircularmapsina3Dspaceoffersgreatbenefitstothestudyofcomparativegenomics.Theprogramisfreelyavailable(underanLGPLlicence)athttp://sourceforge.net/projects/dgenometuner.