2Gupta NP, Ansari MS, Kesarvani P, et al. Role of computed tomography with no contrast medium enhancement predicting the outcome of ESWL for urinary calculi[ J]. BJU Int, 2005,95 (5) :1285 -1288.
3Pareek G, Armenakas NA, Fracchia JA. Hounsfield unit on computerized tomography predict stone free rates after ESWL [J]. JUrol, 2003,169:1679-1681.