The Study Of Posterior Communicating Artery On Volume Computed Tomography Digital Subtraction Angiography

PART 1 THE STUDY OF POSTERIOR COMMUNICATING ARTERY IN NORMAL SUBJECTS ON VOLUME COMPUTED TOMOGRAPHY DIGITAL SUBTRACTION ANGIOGRAPHYObjectiveTo study the morphology of the posterior communicating artery(PCoA)on volume CT digital subtraction angiography(VCTDSA).MethodsVCTDSA scans from 158 cases(316 sides)were performed,and then the images of PCoA were reconstructed by VR and slab MIP.The variation,appearance,infundibular dilatation(ID)of the PCoA were observed.The diameters of PCoA,and ID,the proximal inflow angle of PCoA were Measured.Results(1)PCoA variation and appearance:absent 52.8%,dysplasia 8.9%,Fetal type 17.1%,Adult type 21.2%,bend 64.5%,straight 35.5%.Fetal type-PCoA is more straight,Adult type-PCoA is more bend(x2=7.5,P=0.006).(2)PCoA diameter and the proximal inflow angle had no statistical difference between men and women,so were they between right and left.(3)The incidence of PCoA-ID was 26%(32/121).The variation of PCoA(x2=10.2,P=0.001),The diameter(t=-5.7,P=0.000),and proximal inflow angle of PCoA(t=-3.2,P=0.002)between ID group and non-ID group had statistical difference.ConclusionsThe incidence of PCoA-ID is higher in adult type PCoA,or with smaller diameter or smaller inflow angle of PCoA.PART 2 STUDY ON THE CORRELATION BETWEEN POSTERIOR COMMUNICATING ARTERY,S DIAMETER AND BASILAR ARTERY,S DIAMETERObjectiveTo study the correlation between posterior communicating artery‘s diameter and basilar artery's diameter on volume CT digital subtraction angiography.MethodsVCTDSA scans from 158 cases(316 sides)were performed,and then the images of PCoA were reconstructed by VR and slab MIP.The diameters of PCoA,and BA were Measured.ResultsThere was a remarkably negative correlation between PCoA and BA diameter(r=-0.998,P=0.000).ConclusionThe diameter of PCoA is negatively correlated with the diameter of BA.