Abstract: Objective To measure the shape of renal pelvis and calyces by three-dimensional digital measurement,analyze its correlation with the occurrence of kidney stones,and explore the correlation between anatomical morphological factors and disease,so as to provide important reference for the prevention and treatment of kidney stones in central Inner Mongolia.
Methods Patients with kidney stones who visited the department of Urology, Affiliated Hospital of Inner Mongolia Medical University from January 2018 to May 2021 were randomly collected,The patients who lived in the central Inner Mongolia(Hohhot, Ordos, Baotou, and Jining for >10 years before the illness) for a long time were chosen as the experimental group [68 cases,(52.12±16.32)years old].68 cases were chosen as the control group[including 43 cases on the normal side of patients and 25 cases in the normal people,(49.52±18.14)years old],excluding patients with abnormal metabolism and organic kidney disease.CT data were imported into Mimics16.01 software for 3D digital reconstruction after iodoparol urography,and measured six indicators of anteroposterior diameter of renal pelvis(APD),infundibular width(IW),infundibular length(IL),infundibular pelvis angle(IPA),calyx and pelvis height(CPH),renal pelvis and hilum width(RHW) were analyzed.The above indexes were compared between groups and Logistics regression analysis was carried out with the formation of kidney stones.Results There was no significant difference between the APD and the RHW in the experimental group and the control group (P>0.05),and there were statistically significant differences in IL,IW,IPA and CPH between the two groups (P<0.05).There was no significant correlation between the APD,IW and the formation of renal stones (P>0.05),IW and IPA were negatively correlated with the formation of kidney stones,while IL and CPH were positively correlated with the formation of kidney stones.Conclusion Three-dimensional digital reconstruction can clearly display the renal pelvis, calyces and calculi lesions. There was no significant correlation between the anterior and posterior pelvis diameter and the width of the pyelonephric gate and the occurrence of kidney stones,while the IW,IL,IPA and CPH have certain correlation with the occurrence of renal calculi.

Key words: central region of Inner Mongolia, kidney pelvis, kidney calices, three-dimensional digitization, kidney stones