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时间:2020-04-30
《低管电压扫描条件下个体化对比剂用量方案在冠状动脉CTA中的应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、·616·中国介入影像与治疗学2014年第11卷第9期ChinJIntervImagingTher,20l4,Vol11,No方法技术学Individualizedcontrastmediumprotocolin64-。rowmulti_‘slicespiralCTcoronaryangiographywithlowscantubevoltageKANGDe—qiang,ZHAOJing,HUAHai—qin,PENGNan,WANGLing—pu,LISheng-ao(Departmentof
2、Radiology,DongtangHospitalofBeijingTraditionalChineseMedicineUniversity,Beijing100078,China)[Abstract]0bjectiveToexplorethevalueofreducingcontrastmediumusage,improvingcoronaryCTAefficiencyandimprovingimagequalityin64一rowCTcoronaryangiographywith100kV
3、pscantubevoltagetakingbodymassindex(BMI)combinedbodysurface(Suf)asanewstandardprotoco1.MethodsPatientswith17.O≤BMI<26.5weredividedtocon—tro[group(groupA,—ioo)andindividualizedgroup(groupB,n—100)randomly.PatientsingroupAwereexaminedwithtubevoltageof12
4、0kVpandtubecurrentof600mA.Thecontrastmedium(CM)dosagewas0.8—1.0ml/kgaccord—ingtotheirbodyweight(about65mlintota1),salineusagewas50ml,andinjectionflowratewas5.0ml/s.WhenalltheexaminationswerefinishedingroupA,alinearregressionwasusedtoanalyzethecorrela
5、tionbetweenCMdosageandBMI,Suf.Theresultwasusedtoformulaaregressionequation.Another100patientsingroupBunderwentindividualizedcoronaryCTAwithtubevoltageof100kVpandcurrentof600mA.CMdosagewasvariableaccordingtothedatainthetablelist,being35—65mlofCMand3O5
6、Omlofsaline(CM×80),andiectionflowratewas5.0ml/s.ResultsTheCMdosage,attenuationvaluesinascendingaortaandleftventricle,imagenoise,volumeCTdoseindex(CTDIvo1),andradiationdosagehadsignificantlydifferencesbetweenthetwogroups(allP<0.05).Thecontrastmediumus
7、agere—ducedby28.16,aortaattenuationincreasedby21.58%,CTDIvolreducedby39.54,radiationdosagereducedby4O.83,andimagenoiseincreasedby27.15ingroupBcomparedwithgroupA.Theimagescorealsohadsignificantlydifferencebetweenthetwogroups(P<0.01).Betterscoreperform
8、anceobtainedingroupBthangroupA(P<0.01).ConclusionLowerusageofCMandbetterangiographyperformancesareobtainedusingBMIcombinedSufasanewproto—colinindividualizedcoronaryCTAexamination.Alsolowradiationdosage。andfineimagequalityachievewhen100kVpscanprotoco1
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