双源ct低剂量回顾性扫描模式对先心患儿冠脉成像最佳时相研究

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1、Abstr．actcardioVascular，a11dthe38casesofpatientswithamediallageof1．375years(1monthsto5yearsold)，meaVeragewei曲tof9．47±2．55Kg(2．5Kgto15Kg)，meaVerageheanratewaS122．79±20．04times／min(74-l48times／min)．choosetheDual-sourceCTlow—doseretroSpectiVeECG·gatedscallingmode

2、，aUchildrenscanedunderthequietbreatlling，aIldcan’tcooperatorscanedaReranesmesia．AdoptDSCTpresetchildrenIsheartscaIlIlingmode(CardiacDScllildemheartECG)，usedtheheadtofootscanIlings。quence，thechestpositionedfirstly，thescopewasthoracicinlettomeliVer，con仃astmedium

3、adoptmeoptimal370mgI／ml，mehigll-pressureStellaIlt岫ectorwas印plicated(StellaIltdualnow)，蜘ectedatarateofO．4—2．Oml／s，5．O一30mlofcon仃astagentbymebackofhaIldveinorscalpvein，then3-20mlsalines01utionwasinjected．weusedmemaImaltriggersc锄ingmethods，monitoredtheleVelintheT

4、hdorcaVity，wedecidedmemomtoringstartedtimeaccordingtothecontrastinmsiontime(2stostartearliermaIlcontrastin向siontime)westanedthescaIlllingaRertheri曲theancompletdyfilledcon仃astagents，3．6ssc黝ingdelay．ScanparameterS：80KVP-1OOKVPnIbeV01tage，elec埘ccurrent：80mAs．theo

5、riginalimagewilllbereconstllJctedbyl0％interval，thereconstmctedthicknesswas0．6mm，aIldreconstructedintervalwasO．5mm，thereconstllJctionmethodwasconVentionalB26．tenphasesoft11eheartwasanalyzedindual—sourCepost-processingworkstation，wrhichusedthemulti．plaIlereo珞aIl

6、ization，ma)【imllIIldensityprojectionandcur、，edsurfacereconstructionfor3Dreconstmction，andwerecordedtheDLP’throughtheradiationdosetabletocalCulatemeradiationdoseofinspection，twoCTphySiciaIlseValuatedqualityofmecomna巧ima舀ng，a11drecordedthequalityscore．theevaluat

7、ionofthecorona巧ane巧ima百ngusedthethreepointsmemod，mreepoints：theori百noftllecomnarya11dmerelationshipbetweenthepulmonaryaneryandthecoron叫caIlbecleallyshown．T11et、)~ropoints：theoriginofthecoronaWaIldmerelationshipbet、)l，eenpulmona叫arte巧aJldthecoronarycanbeshown，b

8、utnotsoclearlyoVerally．Theonepoint：the∞ronaryopeningscouldbeclearlydiagnosed，buttherelationshipbetweenthepulmonaryane巧was如zzy．the0point，theopeningsaIldtherelationShipbetweenpulmona