To evaluate the diagnostic value of 64-slice volume CT scansfor detecting ureteralstones.

Clinical data of 200 patients with ureteral stones were reviewed and analyzed. All the enrolled patients underwent 64-slice volume CT scanningand the images were analyzed including multi-planar reconstruction, curved planar reformation, maximum intensity projection, volume rendering, and surface shade display. All patients had complete imaging data.

Among the enrolled 200 patients, the diameter of the smallest stone was 1.5mm. The stones were located in the upper ureter in 70 cases, in the middle ureter in 35 cases, in the lower ureter in 83 cases, and multiple calculi in the upper, middle and lower segments of the ureter in 12 cases. It was also found some other accompanyingchanges: renal cysts in 100 cases, ureterocelein 5 cases, bladder diverticulum in 4 cases, renal calculi in 30 cases, bladder stones in 10 cases, empyema of the ureter and renal pelvis in 2 cases, and ureter and renal pelvis malformations in 20 cases.

64-slice volume CT has important significance for the diagnosis of ureteral calculi, their localization, size, morphology, amount and surrounding circumstances, and also to reveal the accompanying alterations such as urinary malformations, and renal or bladder stones.