The Usefulness of Ultrasound Colour-Doppler Twinkling Artefact for Detecting Urolithiasis Compared with Low Dose Nonenhanced Computerized Tomography
- 作者：Rikke Rass Winkel ; rikkerass@dadlnet.dk ; Anna Kalhauge ; Knud-Erik Fredfeldt
- 关键词：Twinkling artefact ; Urinary tract stones ; Colour-Doppler ; Ultrasound ; Low dose CT ; Microlithiasis
- 刊名：Ultrasound in Medicine and Biology
- 出版年：2012
- 期刊代码：82_03015629
- 类别：ph
- 出版时间：July, 2012
- 卷：38
- 期：7
- 页码：1180-1187
- 文件大小：264 K
摘要
This prospective study evaluates the usefulness of the twinkling artefact (TA) seen on colour-Doppler ultrasound (US) in diagnosing urolithiasis. US and standard computed tomography (CT) were performed blinded on 105 patients. B-mode US and colour-Doppler used separately and in combination showed 55%sensitivity and 99%specificity (positive predictive value [PPV] 67%and negative predictive value [NPV] 98%). Of CT verified stones, 61%were 鈮? mm. TAs were present in 74%of the B-mode stones (43%of all CT verified stones). Patients with CT verified stone disease had significantly more TAs in other foci than the stone(s) found on CT, suggestive of microlithiasis. In conclusion, colour-Doppler TA is a helpful supplement for detecting urolithiasis when CT is contraindicated. In addition, US can be valuable in monitoring stones left to pass without intervention if they have presented a TA. CT, US and US with colour-Doppler TA can be useful as complementary techniques for detecting stones.