简介:摘要目的探讨在CT增强扫描中如何更好、更有效地使用高压注射器,为临床诊断提供有力的影像支持。方法对235例患者使用高压注射器做增强扫描,取得良好的诊断效果。结果使用高压注射器做增强扫描的患者235例,231例注药顺利,完成增强扫描,占总数的98.3%。1例因对比剂外渗,扫描途中停机重新穿刺、注药完成扫描,占总数0.42%。2例因注药过程中留置针侧孔脱开,致药液外漏,重新注药后扫描成功,占总数0.85%。1例因高压注射对比剂后,CT装置未及时触发,错过设置的扫描时相致增强失败,占总数的0.42%.结论正确、合理地使用高压注射器,可获得更为精准的诊断资料,有利于提高临床诊断水平。
简介:Enlargedvestibularaqueduct(EVA),themostfrequentidentifiablecauseofcongenitalhearingloss,isevaluatedwithhigh-definitionmultidetectorCTintheaxialplane.OurpurposewastodeterminewhichreformattedCTmeasurementsaremostreproducible.Sevenmultiplanarreformattedimageswerecreatedforeachofthe64temporalbonesinpatientswithEVA.Intraclasscorrelationcoefficients(ICC)wereusedtoassessinter-observervariability,andbothlinearregressionandROCanalyseswereusedtocomparethemeasurementswithseverityofhearingloss,asassessedbypuretoneaudiometry.Allsevenmeasurementshadexcellentinter-observervariability,withaverage-measureICCrangingfrom0.92to0.98.Therewasnostatisticallysignificantcorrelationbetweentheradiologicdegreeofaqueductenlargementandseverityofhearinglossusinganyofthesevenmeasurements;ROCanalysesrevealedareasunderthecurvesrangingfrom0.57to0.73.Optimalaccuracywasobtainedwithathresholdof1.75mmasmeasuredattheaqueductalapertureintheP€oschlplane,withsensitivityof0.75andspecificityof0.63.AlthoughtheradiologicmeasurementmaynotserveasareliabletoolforassessingseverityofEVA,P€oschlplanereformattinghasproventobebetterthanconventionalaxialacquisitionplaneforidentifyingpatientswithclinicallysignificanthearingloss.
简介:摘要目的探讨静脉留置针对于磁共振(MRI)增强扫描流程的优化。方法将2014年7月-2014年12月,到本科室行头颅磁共振增强检查的病人536例,随机分为实验组和对照组,实验组提前采用留置针静脉穿刺,卡紧滑动夹,待增强扫描时打开滑动夹,推注对比剂;对照组在头颅平扫完成后,需要注射对比剂时,采用传统的一次性头皮钢针静脉穿刺,然后推注对比剂。分别将两组病人在平均检查时间、发生对比剂渗漏、针头移位、护理服务满意度等进行比较。结果实验组病人在检查时间、发生对比剂渗漏、针头移位、服务流程、护理服务满意度方面均明显优于对照组。结论静脉留置针在磁共振增强扫描中使用安全、优质高效、无并发症,值得推广。
简介:摘要目的明确小肠梗阻患者CT特征是否具有预测手术时机的作用。方法本研究在2010年1月至2012年6月共纳入出现小肠梗阻并具有完整影像资料的患者63例。由两名影像科医生对影像资料进行回顾分析。采用χ2及Fisher检验对患者的影像学特征及手术处理进行单因素分析。同时将显著性因素采用Logistic回归模型进行多因素分析。结果单因素分析结果显示3种CT特征与需要进行手术处理存在相关性,分别为完全性肠梗阻、小肠扩张>4cm及出现转换点。多因素分析显示出现转换点为小肠梗阻进行手术处理的显著因素(OR=19,95%置信区间1.8-201,p=0.014)。结论在发生小肠梗阻的患者中,CT特征出现转换点的患者需要进行手术的机率显著增加
简介:ObjectiveToexplorethevalueofcomputedtomographyvirtualendoscopy(VE)inassessingossicularchaindisruptionintemporalbonefractureandeartraumawithintacttympanum.MethodsHighresolutionspiralcomputerizedtomography(CT)wascompletedin35casesoftemporalbonefractureand5casesoftympanumtrauma,allwithintactorhealedtympanum.Three-dimensionalreconstructionwascompletedus-ingavirtualendoscopysoftware.Audiologicaltestswereconductedinallpatientsandevaluationoffacialnerveinjuryinpatientswithfacialparalysis.Patientswithmildconductivedeafness,ossicularchainsublux-ationonVE,andnofacialparalysisweretreatedconservativelyfor4-12weekswithrepeatedhearingevalu-ation;thosewithfacialparalysisunderwentsurgeryifnorecoveryafter4-8weeksofconservativetreat-ment.Patientswithmoderatetosevereconductivehearinglossormixedhearingloss,incuslongprocessfractureordislocationonVEandfacialparalysis,underwentossicularchainreconstructionandfacialnervedecompressionafterconservativetreatmentfor4-8weeks,orexploratorytympanotomyonlyifnofacialpa-ralysis.VE,audiologicaltestsandfacialnervefunctiontestswererepeatedin3-6monthsaftersurgery.Re-sultsOfthe6caseswithmildconductivehearingloss,ossicularchainsubluxationandnofacialparalysis,3recoveredtonormalhearingspontaneouslyand3showednosignificantimprovement,after4-12weeksofconservativetreatment.Afterconservativetreatmentfor4-8weeks,3ofthe12caseswithmildconductivedeafness,ossicularchaindislocationonVEandfacialparalysisrecoveredtonormalhearingandHouse-Brackmann(HB)gradeIfacialfunctionfromHBgradeII,4showedfacialfunctionrecoverytoHBgradeI(n=2)orII(n=2)fromHBgradeIIIbutnohearingrecovery,and5gainednorecoveryandwentontoreceiveexploratorytympanotomyandfacialnervedecompression.The11caseswithmoderatetosevereconductivedeafness,incuslongprocessfr
简介:ObjectiveToexplorethevalueofcomputedtomographyvirtualendoscopy(VE)inassessingossicularchaindisruptionintemporalbonefractureandeartraumawithintacttympanum.MethodsHighresolutionspiralcomputerizedtomography(CT)wascompletedin35casesoftemporalbonefractureand5casesoftympanumtrauma,allwithintactorhealedtympanum.Three-dimensionalreconstructionwascompletedusingavirtualendoscopysoftware.Audiologicaltestswereconductedinallpatientsandevaluationoffacialnerveinjuryinpatientswithfacialparalysis.Patientswithmildconductivedeafness,ossicularchainsubluxationonVE,andnofacialparalysisweretreatedconservativelyfor4-12weekswithrepeatedhearingevaluation;thosewithfacialparalysisunderwentsurgeryifnorecoveryafter4-8weeksofconservativetreatment.Patientswithmoderatetosevereconductivehearinglossormixedhearingloss,incuslongprocessfractureordislocationonVEandfacialparalysis,underwentossicularchainreconstructionandfacialnervedecompressionafterconservativetreatmentfor4-8weeks,orexploratorytympanotomyonlyifnofacialparalysis.VE,audiologicaltestsandfacialnervefunctiontestswererepeatedin3-6monthsaftersurgery.ResultsOfthe6caseswithmildconductivehearingloss,ossicularchainsubluxationandnofacialparalysis,3recoveredtonormalhearingspontaneouslyand3showednosignificantimprovement,after4-12weeksofconservativetreatment.Afterconservativetreatmentfor4-8weeks,3ofthe12caseswithmildconductivedeafness,ossicularchaindislocationonVEandfacialparalysisrecoveredtonormalhearingandHouseBrackmann(HB)gradeIfacialfunctionfromHBgradeII,4showedfacialfunctionrecoverytoHBgradeI(n=2)orII(n=2)fromHBgradeIIIbutnohearingrecovery,and5gainednorecoveryandwentontoreceiveexploratorytympanotomyandfacialnervedecompression.The11caseswithmoderatetosevereconductivedeafness,incuslongprocessfractureordis
简介:摘要目的MRI、CT与钼靶X线在乳腺疾病诊断中的价值。方法本文选取我院于2013年08月~2014年08月收治的36例乳腺疾病患者,所有患者在手术开始前实施MRI、CT与钼靶X线三种不同方式的诊断检查,进一步和手术后病理结果进行对比分析。结果三种不同检查方法诊断结果和术后病理结果对比后发现采用MRI、CT两种检查方法的诊断结果和术后病理结果之间没有显著性差异,同时钼靶X线诊断结果和MRI、CT以及术后病理结果之间都存在显著性差异(P<0.05),具有统计学意义。结论乳腺疾病患者采用MRI、CT与钼靶X线不同检查方法检查后,其中钼靶X线可以用于早期乳腺疾病诊断,而MRI和CT两种检查方法具有较高的乳腺疾病检出率和诊断特异性,值得在临床中推广应用。
简介:Objective:Totestthefeasibilityofmeasuringfinetemporalbonestructuresusinganewlyestablishedcone-beamcomputedtomography(CBCT)system.Materialsandmethods:Sixformalin-fixedhumancadavertemporalboneswereimagedusingahigh-resolutionCBCTsystemthathas900framesandcoppertaluminumfiltration.Finetemporalbonestructures,includingthoseofthefacialnervecanalandvestibularstructures,wereidentifiedandmeasured.Results:Thefinestructuresofthemiddleear,includingthetympanicmembrane,tendonofthetensortympani,cochleariformprocessofthesemicanalofthetensortympani,pyramidaleminence,footplateofthestapes,fullpathofthefacialnervewithinthetemporalbone,supralabyrinthinespace,semicircularcanals,pathwayofthesubarcuatecanal,andfullpathofthevestibularaqueduct,wereclearlydemonstrated.Thevestibularaqueducthasamidpointwidthof0.4±0.0mmandopercularwidthof0.5±0.1mm(mean±SD).Thelengthoftheinternalacousticmeatuswas10.6±1.2mm(mean±SD),andthediameteroftheinternalacousticmeatuswas3.7±0.3mm(mean±SD).Conclusion:Thisnovelhigh-resolutionCBCTsystemhaspotentiallybroadapplicationsinthediagnosisofinnereardiseaseandinmonitoringassociatedpathologicalchanges,surgicalplanning,navigationfortheearsurgery,andtemporalbonetraining.
简介:摘要目的探讨SD大鼠采用抗青光眼滤过术处理后热休克蛋白47(Heatshockprotein47,HSP47)在滤过泡中的表达变化及其意义。方法选取健康成年SD大鼠24只,雌雄各半,均随机编号1~12号,采用随机数值表法分为2d、4d、6d、10d、14d、正常组6个组(4只每组),2d、4d、6d、10d、14d组大鼠均进行右眼抗青光眼滤过手术处理,术后采用裂隙灯观察各组大鼠滤过泡及眼前节情况,分别与实验第2d、4d、6d、10d、14d处死相应组大鼠,应用实时荧光定量(PCR)技术检测滤过泡中的HSP47、Ⅰ、Ⅲ型胶原蛋白的表达情况。结果SD大鼠在术后第2d的HSP47、Ⅰ、Ⅲ型胶原蛋白、mRNA在滤过泡中的表达就略微的上升,但与正常组比较差异不显著(P>0.05),术后第4d、6d、10d、14d大鼠滤过泡中的HSP47、Ⅲ型胶原蛋白、mRNA表达水平较正常组显著地升高且差异具有统计学意义(P<0.05);Ⅰ型胶原蛋白、mRNA在大鼠抗青光眼术后第6d、10d、14d较正常组显著的升高(P<0.05)。结论SD大鼠抗青光眼术后HSP47蛋白及mRNA的表达水平变化基本与Ⅰ、Ⅲ型胶原蛋白、mRNA表达变化一致,表明HSP47在大鼠眼滤过泡瘢痕形成过程中可能具有重要作用。
简介:摘要目的探讨多排螺旋CT(MSCT)对肺内孤立性结节的诊断价值,以提高对结节良恶性的鉴别诊断,并为临床治疗提供参考。方法回顾性分析2012年3月至2015年3月经我院病理证实的94例肺内孤立性结节患者的影像资料,观察结节的大小、形态及相关CT征象,并与病理结果进行对照。结果94例肺内孤立性结节患者中恶性63例,良性31例,观察结节的大小、部位及相关CT征象(钙化、分叶、毛刺、细支气管征、胸膜凹陷征、血管集束征等),并进行统计学分析。结论毛刺征、胸膜凹陷征是提示恶性结节的重要CT征象,对临床及时治疗具有重要的指导意义。