The study of posterior communicating artery on volume computed tomography digital subtraction angiography
LAN Hui, HU Ying， LV Fa-jin, LI Kang
Chinese Journal of Clinical Anatomy ›› 2017, Vol. 35 ›› Issue (5) : 504-507.
The study of posterior communicating artery on volume computed tomography digital subtraction angiography
Objective To study the morphology of the posterior communicating artery (PCoA) on volume CT digital subtraction angiography (VCTDSA). Methods VCTDSA 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, basal artery (BA) and ID, and 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 (χ2=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. The correlation between PCoA and BA diameter had remarkably statistical significance（r=-0.998，P=0.000）. (3) The incidence of PCoA -ID was 26% (32/121). The variation of PCoA (χ2=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 the ID group and non-ID group had statistical difference. Conclusions (1) The diameter of PCoA is negatively correlated with the diameter of BA; (2) The incidence of PCoA -ID is higher in adult type PCoA, or in PCoA with smaller diameter or smaller inflow angle.
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