4Limb J,Bellman GC.Tubeless percutaneous renal surgery:Review of first 112 patients.Urology,2002,59:527-531.
5Pedersen JF.Percutaneous nephrostomy guided by ultrasound.J Urol,1974,112:157-159.
6Koehrmann KU,Michel MS,Rassweiler JJ,et al.Focused ultrasound.In:Smith AD,ed.Smith's Textbook of Endourology.St.Louis:Quality Medical Publishing,1996.661-679.
7Segal AJ,Spataro RF,Linke CA,et al.Diagnosis of nonopaque calculi by computed tomography.Radiology,1978,129:447.
8Smith RC,Verga M,McCarthy S,et al.Diagnosis of acute flank pain:Value of unenhanced helical CT.AJR Am J Roentgenol,1996,166:97-101.
9Olcott EW,Sommer FG,Napel S.Accuracy of detection and measurement of renal calculi:In-vitro comparison of hree-dimensional spiral CT,radiography and ephrotomography.Radiology,1997,204:19.
10Barbaric ZL,Hall T,Cochran ST,et al.Percutaneous nephrostomy:Placement under CT and fluoroscopy guidance.AJR Am J Roentgenol,1997,169:151-155.