Abstract: ［Abstract］  Objective〖HTSS〗〓To discuss the application value of Xray digital tomosynthesis(Tomos technology) in localization diagnosis of urinary calculus.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓Sixtynine patients with definite diagnosis of urinary calculi were treated with kidneyureterbladder(KUB), Tomos technology and dual source CT. The quality of the image was graded and compared by the image diagnosis physician.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓The image quality of dual source CT and Tomos technology is better than that of KUB plain film. The image quality of dual source CT is better than that of Tomos technology. The positive rate and diagnosis rate of dual source CT and Tomos technology were higher than those of KUB scan, the difference was statistically significant(P＜005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓The Tomos technology improved the detection rate of ureteral calculus and significantly improved the image quality, which played a useful supplement role in the clinical examination of the lithiasis.

Key words: urinary calculi, Xray digital tomosythesis, diagnosis