多层螺旋CT肝脏灌注的初步研究(5)

发布时间:2021-06-08

第二掣蹶大学硕士学位论文多层螺旋CT蝌脏灌注抟初步研究

StudyofHepaticPerfusionwith

AbstractMulti—sliceSpiralCT

Objective:Toresearchthescantechniqueofhepaticpeffusionwithmulti—slicespiralCTandit’Svalueinthediagnosisanddifferentialdiagnosisofliverdiseases.Methods:FromJune2002tOFebruary2003,88patients(53

femalelunderwentdynamicCTofmeliverwereselected

agewasmale,35tOottrstudyMeaninto48(22to75)。60volunteers谢出。波hepaticdisorderweredivided3groupsaccording幻the

7ml/sinjected17casesspeedofcontrastmedium(4ml/s,5ml/s,respectively).Ofthewithcirrhosis,9weremild,8weremuchsevere.11patientssufferedfromhepaticcancer,Theyallhavenormalcardiacfunction。Aproperslicewasselectedafterconventionalabdominal

repeatedlyscannedscanandUS堍aSomatomPlus4VolumeZoomscanner.40images

awereacquiredwith0.5一seescanningtimeand

ofconWasta2-seeintervalwithinto0~80-secafterbolusinjectionmedium.Patientswereasked

融蘸smoothly.Aregionofinterest(RODof氇eaorta,spleenandliverWaS

curvedrawn,andCTvaluesoftheseROIsweremeasuredtogettime-density

(TDC),andperfusionvNuewerecalculatedoutwithfollowingformulas.Hepaticarterial

splemcperfusion(HAP)=peakgradientoftheliverTDCbeforethepeak/peakaortaenhancement;Hepaticportalperfusion(}卿)=peak

aortagradientoftheliverTDCafterthesplemcpeak/peak

liverenhancement;Totalperfusion(TLP)一}认P+}丑叩;Hepaticarterialperfusionindex(}巾I)=

Results:1。HAP/TLP;Hepaticportalperfusion

Althoughthereis

tOnoindex(PPI)=HPWlLRsignificantdifferenceofallindexeswhencompared4ml/sto7ml/sgroup,thedifference5ml/sgroup,and5ml/sbetween4ml/sand4

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