Department of Urology, Ijinkai Takeda General Hospital, Kyoto, Japan.
Department of Urology, Ijinkai Takeda General Hospital, Kyoto, Japan.
Urology. 2014 Aug;84(2):285-8. doi: 10.1016/j.urology.2014.04.010. Epub 2014 Jun 5.
To assess the efficacy of ultrasonography (US) for detecting renal stone using noncontrast enhanced computed tomography (NCCT) as a standard reference.
We performed a retrospective study of 428 patients who underwent NCCT and US imaging on the same day from January 2009 to September 2011. The sensitivity of US to detect each individual stone and at least 1 stone per kidney was evaluated. The detection rates according to the location and stone size were also examined. We compared the sizes of stones determined in the longest axis of NCCT and US, and performed group classification based on size to examine whether stone sizes measured by NCCT and US were similar.
Of 856 kidneys, NCCT detected 474 stones in 361 kidneys, whereas US detected 332 stones of 474 stones detected by NCCT, yielding a sensitivity of 70.0% and a specificity of 94.4%. Similarly, US alone detected at least 1 stone in 285 kidneys, yielding a sensitivity of 78.9% and a specificity of 83.7%. Expectedly, the detection rate for the left upper calyx was lower than that for other sites (P = .002), and the detection rate increased with stone size. Furthermore, stone sizes obtained by US were positively correlated with those obtained by CT, and stone size measurement by NCCT and US was concordant in 240 of 332 cases (72%). Importantly, stone size was only a factor that affected renal stone diagnosis using US.
US is an effective imaging modality for detecting renal stones.
以非增强计算机断层扫描（NCCT）作为标准参考，评估超声（US）检测肾结石的功效。
我们对 2009 年 1 月至 2011 年 9 月期间同一天接受 NCCT 和 US 成像的 428 例患者进行了回顾性研究。评估了 US 检测每个单独结石和每个肾脏至少 1 个结石的敏感性。还检查了根据位置和结石大小的检测率。我们比较了 NCCT 和 US 确定的最长结石轴的大小，并根据大小进行了组分类，以检查 NCCT 和 US 测量的结石大小是否相似。
在 856 个肾脏中，NCCT 在 361 个肾脏中检测到 474 个结石，而 US 在 NCCT 检测到的 474 个结石中检测到 332 个结石，敏感性为 70.0％，特异性为 94.4％。同样，US 单独在 285 个肾脏中检测到至少 1 个结石，敏感性为 78.9％，特异性为 83.7％。不出所料，左肾盂上段的检测率低于其他部位（P = 0.002），并且随着结石大小的增加检测率也增加。此外，US 获得的结石大小与 CT 获得的结石大小呈正相关，在 332 个病例中有 240 个（72％）的 NCCT 和 US 结石测量结果一致。重要的是，结石大小仅是 US 诊断肾结石的唯一因素。
US 是一种有效的肾结石检测成像方式。
