Unenhanced Spiral CT in Acute Ureteral Colic: A Replacement for Excretory Urography?

Jeong Ah Ryu, Bohyun Kim, Yong Hwan Jeon, Jongmee Lee, Jin Wook Lee, Seong Soo Jeon, Kwan Hyun Park

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Objective: To compare the usefulness of unenhanced spiral CT (UCT) with that of excretory urography (EU) in patients with acute flank pain. Materials and Methods: Thirty patients presenting with acute flank pain underwent both UCT and EU. Both techniques were used to determine the presence, size, and location of urinary stone, and the presence or absence of secondary signs was also evaluated. The existence of ureteral stone was confirmed by its removal or spontaneous passage during follow-up. The absence of a stone was determined on the basis of the clinical and radiological evidence. Results: Twenty-one of the 30 patients had one or more ureteral stones and nine had no stone. CT depicted 22 of 23 calculi in the 21 patients with a stone, and no calculus in all nine without a stone. The sensitivity and specificity of UCT were 96% and 100%, respectively. EU disclosed 14 calculi in the 21 patients with a stone and no calculus in eight of the nine without a stone. UCT and EU demonstrated secondary signs of ureterolithiasis in 15 and 17 patients, respectively. Conclusion: For the evaluation of patients with acute flank pain, UCT is an excellent modality with high sensitivity and specificity. In near future it may replace EU.

Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalKorean journal of radiology
Issue number1
Publication statusPublished - 2001
Externally publishedYes


  • Stone
  • Unenhanced CT Excretory urography Ureter

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


Dive into the research topics of 'Unenhanced Spiral CT in Acute Ureteral Colic: A Replacement for Excretory Urography?'. Together they form a unique fingerprint.

Cite this