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Nature Reviews Urology 6, 526–527 (1 October 2009) | doi:10.1038/nrurol.2009.196

Stones: Impact of dose reduction on CT detection of urolithiasis

M. Hammad Ather & Wasim A. Memon

The excellent spatial resolution provided by the multislice CT scanner has made unenhanced CT the imaging modality of choice for the diagnosis and follow up of urolithiasis. As well as its superior sensitivity and specificity, an added advantage of CT over intravenous urography is its ability to distinguish renal colic from alternate causes of flank pain, such as appendicitis or acute gynaecological conditions.