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

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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