PMID: 9542010May 16, 1998Paper

Noncontrast helical CT for ureteral stones

World Journal of Urology
I C BoridyS M Goldman

Abstract

Noncontrast helical computed tomography (CT) has recently been found to be superior to excretory urography (IVU) in the evaluation of patients with suspected ureterolithiasis. Noncontrast helical CT does not require the use of intravenous contrast material with its associated cost and risk of adverse reactions and can be completed within 5 min, in most cases. Noncontrast CT often detects extraurinary pathology responsible for the patient's symptoms. CT is also more sensitive than IVU in detecting the calculus, regardless of its size, location, and chemical composition. However, confidently differentiating ureteral calculi from phleboliths along the course of the ureter may, at times, be difficult. The "tissue-rim" sign, a rim of soft tissue attenuation around the suspicious calcification, is helpful in making this distinction. Noncontrast CT does not provide physiological information about renal function and the degree of obstruction. A pilot study has suggested a proportional relationship between the extent of perinephric edema and the degree of obstruction. The cost of the examination and the radiation dose delivered to the patient may be higher with CT. Despite these limitations, noncontrast helical CT has quickly become the...Continue Reading

Citations

Mar 16, 2001·Journal of Endourology·K R Anderson, R C Smith
Jan 28, 2004·Journal of Endourology·Scott Van AppledornRaymond J Leveillee
Jul 20, 2002·European Journal of Emergency Medicine : Official Journal of the European Society for Emergency Medicine·L D PrinaR E Weber
Aug 1, 2000·AJR. American Journal of Roentgenology·K C SawJ C Williams
Dec 26, 2001·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·J A RyuK H Park
Feb 25, 2000·Seminars in Ultrasound, CT, and MR·M Y ChenR B Dyer
Jan 8, 2018·Clinical and Experimental Emergency Medicine·Mun Ki MinSeong Wook Park

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