title: Use of tomography and ultrasound in the diagnosis of nonopaque renal calculi.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007669:Kidney Calculi / Q000000981:diagnostic imaging*; D007682:Kidney Pelvis / Q000000981:diagnostic imaging; D014056:Tomography, X-Ray; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography