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1、ChineseMedicalJournal2001;114(10):1015-1018·1015·CTvirtualendoscopyoftheauditoryossicularchain:clinicalapplicationsWANGDong王东,ZHANGWanshi张挽时,XIONGMinghui熊明辉,YUMin喻敏andXUJiaxing徐家兴Keywords:middleear·auditoryossicles·three-dimensionalCT·virtualendoscopyObjectiveToevaluate
2、theclinicalapplicationsandlimitationsofCTvirtualendoscopy(CTVE)intheauditoryossicularchain.MethodsCTVEoftheauditoryossicularchainwasperformedwith1.0mmcollimationatpitch1.0,bonealgorithm,9.6cmfieldofview,and0.1-0.2mmreconstructionintervalin40patientswithmiddleeardiseases
3、.30caseswereconfirmedbysurgery.ResultswerecomparedwiththefindingsofaxialhighresolutionCT(HRCT)andmultiplanarreformation(MPR)imagesandsurgery.ResultsTheaccuracyofCTVEimagesindetectingossiculardestructionwas92.6%,significantlyhigherthanthatofaxialHRCT(83.9%)andmultiplanar
4、reformation(76.5%)images.CTVEcouldalsoclearlyrevealthepostoperativeconditionandcongenitaldysplasiaoftheauditoryossicularchain.ConclusionsCTVEcanclearlydemonstrateathree-dimensionalimageoftheauditoryossicularchainandisusefulinevaluatingdiseasesoftheear,especiallytheaudit
5、oryossicles.CTVEcouldnotclearlydemonstrateabnormalsofttissuewithinthetympaniccavity,abnormalchangesofthetympanicmembraneandtympanicwalls,andcouldbeeasilyinfluencedbyartificialfactors.ChinMedJ2001;114(10):1015-1018CTvirtualendoscopy(CTVE)isathree-dimensional(10patients)w
6、ereverifiedbyclinicalinformation(medicalhistory,syptomsofthepatientsandclinicalexamination).techniquewhichpermitsdepictionoftheinnersurfaceofanatomiccavities.IthasbeenwidelyusedinevaluatingSpiralCTscanningwasperformedusingaGEHiSpeedCT/ilesionsofthenasalcavity,paranasals
7、inuses,trachea,bronchi,larynx,colon,andbloodvesselswithencouragingunit.Axialimagesparalleltotheorbito-meatallinewereresults.1,2ThereareonlyafewstudiesonCTVEoftheacquiredwithcollimationof1.0mm,pitchof1.0,fieldofauditoryossicularchain,3-5andtheresultsshowedthatview(FOV)20
8、-25cm,120kVp,260-360mAs,and512×512matrix.ThescanregionrangedfromtheinferiorCTVEcouldeasilyandeffectivelydemons
