Comparison of radiological measurement and actual size of ureteral calculi.
100 ureteral calculi were measured on X-ray films and directly on the stone after passage or removal. The largest diameters were compared. The size of the stone was radiologically overestimated for 59 stones, correct for 26 and underestimated for 15. 73 of the stones were radiologically measured within +/-25% of the actual size.
D005069:Evaluation Studies as Topic; D006801:Humans; D014514:Ureteral Calculi / Q000000981:diagnostic imaging*; D014567:Urography / Q000592:standards*