Objective:To explore the diagnostic value of emergency CT scan in patients with ureteral calculi.Methods:36 patients with ureteral calculi obstruction were selected,and the emergency CT data were retrospectively analyzed.Results:In 36 cases,stones were located in the abdominal segment of ureter in 21 cases,pelvic segment in 12 cases,an intramural segment in 3 cases,left side in 17 cases,right side in 19 cases.12 cases were complicated with renal pelvis calculi.35 cases had hydroureter above stones,5 cases s...