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: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: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。
简介:目的:通过三维重建CT分析慢性化脓性中耳炎(chronicsuppurativeotitismedia,CSOM)患者的咽鼓管解剖,结合咽鼓管测压结果分析CSOM患者的咽鼓管特点及与咽鼓管功能相关性。方法收集CSOM患者60例(68耳),其中行咽鼓管测压检查示咽鼓管功能不通33耳,为不通组;咽鼓管功能通畅35耳,为通畅组。正常对照组6例(12耳)。所有受试者均采用多层螺旋CT分别行颞骨静态及Valsalva后CT扫描,并作咽鼓管三维重建,测量并比较三组软骨部全长、静态下软骨部开放区域、Valsalva后软骨部开放区域、软骨段与骨段之间的角度。结果CSOM患者咽鼓管畅通组与不通组均较对照组全段软骨短(F=4.771,P=0.001),静态咽鼓管软骨段开放长度短(F=5.110,P=0.008),Valsalva后软骨开放长度短(F=5.214,P=0.008),但咽鼓管畅通组与不通组之间比较无统计学差异,咽管软骨段与骨段之间的角度三组间无统计学差异。7%CSOM患者存在咽鼓管骨段结构异常。结论CSOM患者咽鼓管全段软骨、静态开放、Valsalva后开放长度均短,且部分存在咽鼓管骨段结构异常。咽鼓管三维CT重建可直观显示咽鼓管异常结构及软骨段开放情况。
简介:摘要目的比较用CT检查和核磁共振检查诊断股骨头坏死的准确性。方法选取我院2012年12月至2014年5月期间收治的112例股骨头坏死患者作为本次的研究对象,随机分为CT组和核磁共振组,每组各56例。CT组56例患者采用CT进行检查,核磁共振组56例患者采用核磁共振进行检查,对比两种方法诊断股骨头坏死的效果。结果CT组56例患者中,共查出33例股骨头坏死患者,检出率为58.93%,影像显示主要为骨硬化及囊状透亮区。核磁共振组56例患者中,共查出50例股骨头坏死患者,检出率为89.29%,影像显示主要为斑点或条状的T1WI、T2WI信号。核磁共振组检出率明显优于CT组,P<0.05。结论核磁共振技术的敏感性、准确性都明显优于CT技术,值得临床推广应用。
简介:摘要目的评价64排螺旋CT在不同层厚下,后处理减影效果与低剂量研究。方法将我院行头颈部CTA检查的患者100例,随机分为A、B、C、D、E五组,每组20例,A组为平扫、增强层厚,层间距同为0.625mm;B组1.25mm;C组2.5mm;D组3.75mm;E组5.0mm每组采用自动管电流调制技术(ATCM)进行图像采集,图像采集完毕后使用后处理图像重建技术(RetroRecon),除A组外余下4组均进行薄层重建至亚毫米层厚0.625mm,使用AW4.5工作站对每组重建后图像进行后期减影处理,由两名高年资放射科医师使用双盲法对图像质量进行评分,同时比较每组单次扫描的CT剂量加权指数(CTDIvol)、剂量长度乘积(DLP)。结果五组的辐射剂量及图像质量的差异均具有统计学意义(P<0.05),A、B、C三组图像质量相仿并优于D、E组,其中A组辐射剂量最高,随后依次递减E组辐射剂量最低,对五组CTDIvol、DLP辐射剂量大小差异进行统计,具有统计学意义(P<0.05)。结论在不同层厚下使用ATCM技术进行CTA扫描,能明显降低总曝光量和累计DLP,有效降低患者的辐射剂量,而图像质量无较大差异,同时降低了球管的损耗延长了使用寿命。