6Govorcin M,Stojanovic S,Hadnadev D,et al.Diagnosis of ureteral calculi using ultrasongraphy, intravenous urography and unenhanced helical computed tomography[J].Med pregl,2005,58 (9-10):503-506.
7Yihnaz S,Sindel T,Arslan G,et al.Renal colic:comparison of spiral CT, US and IVU in the detection of ureteral calculi[J].Eur Radiol, 1998,8(2):212-217.