title: Tomography of the kidney bed as an aid in differentiating renal pelvic tumor and stone.
abstract: Plain film tomography is of value in detecting small amounts of calcium in "non-opaque" stones. The use of this technique to help differentiate renal pelvic tumor from stone in patients presenting with a filling defect in the renal pelvis is suggested. Four cases in which plain film tomography detected calcium in a renal pelvic stone that could not be seen on routine roentgenograms are presented.
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000000981:diagnostic imaging*; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D007682:Kidney Pelvis; D008297:Male; D008875:Middle Aged; D014056:Tomography, X-Ray