Purpose: There has been no report evaluating the anatomy of the ureter on CT images. The purpose of this study was to retrospectively evaluate the anatomy of the ureter near the ureterovesical junction on preoperative...Purpose: There has been no report evaluating the anatomy of the ureter on CT images. The purpose of this study was to retrospectively evaluate the anatomy of the ureter near the ureterovesical junction on preoperative CT. Methods: Forty patients were analyzed the craniocaudal level of the ureterovesical junction, the transverse distance from the medial line of the body to the ureterovesical junction, the direction of the ureter from the ureterovesical junction, and the length of the ureter from the point of turning medially to the ureterovesical junction. Results: The ureterovesical junction was almost at the level of the upper or middle of the left femoral head. The mean transverse distance on the right and left side was 19.0 and 19.3 mm. The direction of the ureter was almost posterior, lateral, and cranial, but had a wide range of angles. The mean length of the ureter on the right and left side was 24.0 and 23.9 mm. Conclusions: We can evaluate the anatomy of the ureter near the ureterovesical junction on preoperative CT.展开更多
Background:Vesicoureteral reflux is the most common urinary congenital anomaly in children.Given the risk associated with radiation exposure there has been an increasing need for radiation-free method in the diagnosis...Background:Vesicoureteral reflux is the most common urinary congenital anomaly in children.Given the risk associated with radiation exposure there has been an increasing need for radiation-free method in the diagnosis and follow-up of the vesicoureteral reflux.The aim of our study is to compare conventional urosonography without contrast enhancement and x-ray voiding cystourethrography.Patients and Methods:Children with recurrent urinary tract infection with suspected vesicoureteral reflux were included to the study.Vesicoureteral reflux is demonstrated and graded by x-ray voiding cystourethrography.DMSA is used for the evaluation of renal scar.Conventional sonographic procedure was performed in all patients.Ureterovesical junction insertion angle was evaluated.The diameter and length of the ureterovesical junction were also measured.Results:268 children enrolled to the study.Vesicoureteral reflux was demonstrated in 62 children by x-ray voiding cystourethrography.Ureterovesical junction insertion angle measurement had a statistically significant relation for right and left vesicoureteral reflux presence(right:r:.646,p:.01 and left:r:.446,p:.01).Diagnosis sensitivity of vesicoureteral reflux with conventional ultrasonography is 95.10%and specificity is 81%(Youden’s index 76.1%)for the cutoff value of the ureterovesical junction insertion angle is 28.6 degrees.Positive predictive value is 87.2%,negative predictive value is 94.73%and diagnostic accuracy is 86.29%with conventional ultrasonography.Conclusions:Measurement of ureterovesical junction insertion angle,length and diameter by conventional urosonography is an easy accessible and cheap technique with high sensitivity and specificity for the diagnosis and followup of the vesicoureteral reflux without exposure to ionizing radiation.展开更多
文摘Purpose: There has been no report evaluating the anatomy of the ureter on CT images. The purpose of this study was to retrospectively evaluate the anatomy of the ureter near the ureterovesical junction on preoperative CT. Methods: Forty patients were analyzed the craniocaudal level of the ureterovesical junction, the transverse distance from the medial line of the body to the ureterovesical junction, the direction of the ureter from the ureterovesical junction, and the length of the ureter from the point of turning medially to the ureterovesical junction. Results: The ureterovesical junction was almost at the level of the upper or middle of the left femoral head. The mean transverse distance on the right and left side was 19.0 and 19.3 mm. The direction of the ureter was almost posterior, lateral, and cranial, but had a wide range of angles. The mean length of the ureter on the right and left side was 24.0 and 23.9 mm. Conclusions: We can evaluate the anatomy of the ureter near the ureterovesical junction on preoperative CT.
文摘Background:Vesicoureteral reflux is the most common urinary congenital anomaly in children.Given the risk associated with radiation exposure there has been an increasing need for radiation-free method in the diagnosis and follow-up of the vesicoureteral reflux.The aim of our study is to compare conventional urosonography without contrast enhancement and x-ray voiding cystourethrography.Patients and Methods:Children with recurrent urinary tract infection with suspected vesicoureteral reflux were included to the study.Vesicoureteral reflux is demonstrated and graded by x-ray voiding cystourethrography.DMSA is used for the evaluation of renal scar.Conventional sonographic procedure was performed in all patients.Ureterovesical junction insertion angle was evaluated.The diameter and length of the ureterovesical junction were also measured.Results:268 children enrolled to the study.Vesicoureteral reflux was demonstrated in 62 children by x-ray voiding cystourethrography.Ureterovesical junction insertion angle measurement had a statistically significant relation for right and left vesicoureteral reflux presence(right:r:.646,p:.01 and left:r:.446,p:.01).Diagnosis sensitivity of vesicoureteral reflux with conventional ultrasonography is 95.10%and specificity is 81%(Youden’s index 76.1%)for the cutoff value of the ureterovesical junction insertion angle is 28.6 degrees.Positive predictive value is 87.2%,negative predictive value is 94.73%and diagnostic accuracy is 86.29%with conventional ultrasonography.Conclusions:Measurement of ureterovesical junction insertion angle,length and diameter by conventional urosonography is an easy accessible and cheap technique with high sensitivity and specificity for the diagnosis and followup of the vesicoureteral reflux without exposure to ionizing radiation.
