Study Of Three-dimensional Reconstruction Of Multi-slice Spiral CT In The Anatomical Relationships Between Intrarenal Arteries And The Kidney Collecting System In Pigs

Objective:To evaluate the feasibility of three-dimensional reconstruction of multi-slice CT in the anatomical relationships between intrarenal arteries and the kidney collecting system in pigs.Methods:Eighty-one pig kidneys were examined with MVCT. Each kidney was evalu- ated with three-dimensional reconstruction , from which MPR , MIP,VR of the renal artery and collecting system were documented. The anatomical relationships between intrarenal arteries and the kidney collecting system were observed.Results:Three-dimensional images of all pig kidney could exactly show the anatomical relationships between the kidney arteries and collecti- ng system.It was found that there was only 1 artery per kidney. The primary branch of this artery divided into two branchs in 79 cases (97.53%) and three branches in 2 ases (2.47%).The two branchs artery divided into cranial and caudal branches in 72 ases (91.14%).In 7 cases (8.86%) the primary division of the two branchs artery was in a dorsal and in a ventral branch. In all cases 2 arteries (1 ventral and 1 dorsal) involved the cranial caliceal group.In the dorsal mid zone a dorsal artery origina- ted from the cranial division of the renal artery,which was positioned in 48.15% of cases. The arterial supply related to the ventral mid zone of the kidney consisted of branches that coursed horizontally in the ventral surface of the renal pelvis in 82.72% of cases. The caudal division of the renal artery supplied the ventral and dorsal surfaces of the caudal caliceal group in 85.19% of cases, while in 14.81% a dorsal artery supplied its dorsal surface. Conclusion:Three-dimensional reconstruction of multi-slice CT was an effective method in studying the anatomical relationships between the intrarenal arteries and kidney collecting system in pigs.