#1448#中国医学影像技术2004年第20卷第9期ChinJMedImagingTechnol,2004,Vol20,No9DemonstrationofthearteryofAdamkiewiczbymult-idetector-rowCTangiographyZENGYan,ZHAOJian-nong,SONGBin(DepartmentofRadiology,SecondCollegeofClinicalMedicine,ChongqingMedicalUniversity,Chongqing400010,China)[Abstract]ObjectiveTovisualizethearteryofAdamkiewiczbymult-idetector-rowspiralCTangiography(MDCTA),andtoinvestigatetheoptimizedscanningparameters,scandelaytimeandimagepos-tprocessingmethods.MethodsAtotalof125consecutivenormalsub-jectswithoutanyhistoryofthoracicandabdominallesionswhounderwentcontras-tenhancedCTexaminationwereenrolledtoprospectivelyinvestigatetheoptimizationofMDCTAtechniques,intermsofscan-triggeringCTthreshold,scandelaytimeandvariousimagepos-tprocess-ingmethodology,forthedepictionofthedetailedanatomyofthearteryofAdamkiewicz.ResultsThebestscanningparameterswereasfollows:0.5sperrotation,0.75mmslicethickness,1.5pitch.CTvalueof170Huwasselectedasthethresholdtotriggerdataacquis-ition.WhenthisCTthresholdvaluewasreached,thescanningwasdelayedforanother18s,andthenhelicalscanningautomaticallybegan.AxialimageswerereconstructedwithB20falgorithm,1mmslicethicknessand0.75mminterval.Multiplanarreformation(MPR),curvedplanarreformation(CPR)andmaximumintensityprojection(MIP)wereadvantageousindepictingthearteryofAdamkiewicz.ConclusionUsingtheoptimizedscanningandreconstructiontechniques,16-sliceMDCTAcanclearlydepictthedetailedanatomyofthearteryofAdamkiewicz(includingtheorigin,thebranchingpatternsandtheentirecourse).Asanoninvasiveimagingtechnique,optimizedMDCTAshouldbethemethodofchoiceforthedepictionofthearteryofAdamkiewicz.[Keywords]ArteryofAdamkiewicz;Tomography,X-raycomputed;Angiography多排螺旋CT血管造影术显示脊髓Adamkiewicz动脉曾燕1,赵建农1,宋彬2(1.重庆医科大学第二临床学院放射科,重庆400010;2.四川大学华西医院放射科)[摘要]目的探讨多排螺旋CT血管成像技术(MDCTA)显示脊髓Adamkiewicz动脉的最佳扫描参数、强化延时时间及图像重建方法。方法125例胸、腹部无明显器质性病变的连续性受检者,采用不同的扫描触发CT阈值、延时扫描时间和各种图像后处理方法,显示脊髓Adamkiewicz动脉解剖细节。结果最佳扫描参数为扫描速度0.5s、层厚0.75mm、螺距1.5;扫描触发CT阈值170Hu;达到该阈值后再延迟18s后自动启动扫描;原始数据按