Distinguishing pelvic phleboliths from distal ureteral calculi: thin-slice CT findings

Arac M., Celik H., Oner A., Gultekin S., Gumus T., Kosar S.

EUROPEAN RADIOLOGY, cilt.15, sa.1, ss.65-70, 2005 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 15 Konu: 1
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1007/s00330-004-2511-1
  • Sayfa Sayıları: ss.65-70


The objective is to evaluate the appearance of phleboliths and distal ureteral stones by determining their roundness and presence of central lucency on thin-slice CT. Seventy-seven patients with pelvic radioopacities at unenhanced CT were selected. Those patients consequently underwent thin-slice CT with 1-mm collimation, a FOV of 10 cm, a pitch of 1: 1 and a bone reconstruction algorithm. Three radiologists reviewed all images for roundness and the presence of central radiolucency. No calculi showed central lucency on either imaging technique used. Thin-slice CT revealed central lucency in 60% of phleboliths with 100% specificity. Three of 40 ureteral stones showed round contour. Thin-slice CT revealed a round contour in 97% of phleboliths with 93% specificity. Central lucency is a characteristic finding of pelvic phleboliths on thin-slice CT. This finding can therefore be used in combination with roundness as a problem-solving tool in differentiating phleboliths from distal ureteral stones.