| 摘要: |
| 目的 以非增强CT测值为“金标准”，对比研究肾结石大小的超声测值与声影测值的准确性，评估结石后方声影宽度测量肾结石大小的可行性。方法 回顾性分析49例患者51个肾结石的超声报告、超声图像及非增强CT图像，以CT测值为标准，比较超声测值、声影测值与CT测值之间的关系。结果 51个结石，CT测值平均为（8.3±4.6）mm，超声测值平均为（10.1±4.3）mm，(超声测值-CT测值)的平均差值为（1.8±2.0）mm，其中≤5 mm组平均差值最大为(2.5±1.6）mm。≤10mm结石超声测值与CT测值差值具有统计学意义（P<0.05），>10mm结石超声测值与CT测值差值无统计学意义（P=0.289）。14个结石后方无明显声影，其中9个（64.3%）结石≤5 mm。 37个结石后方具有声影，≤10 mm结石声影测值比超声测值更接近CT测值，差别具有统计学意义（P<0.05） 结论 超声直接测量结石会高估结石大小，尤其对于小结石。结石后方声影宽度测量对于提高超声测量结石大小的准确性有一定的价值，但尚需进一步证实。 |
| 关键词: 超声 声影 肾结石 非增强CT |
| DOI： |
| 投稿时间：2020-03-19修订日期：2020-04-09 |
| 基金项目: |
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| Preliminary study on measuring the size of kidney stone by acoustic shadow width |
| GAO Meng,WU Xiaobei,YE Tao,ZOU Xianlun,LI Shanshan,LI Kaiyan |
| () |
| Abstract: |
| objective To compare the accuracy of ultrasonography(US) and acoustic shadow on measuring the size of kidney stone with non-enhanced CT measurement as the "gold standard", and evaluate the feasibility of measuring kidney stone size by posterior acoustic shadow width Methods The US report, US image and non-enhanced CT image of 51 kidney stones in 49 patients were analyzed retrospectively.The relationship between US stone size, shadow size and CT stone size was compared. Results A total of fifty-one stones , the average CT stone size was (8.3±4.6) mm, and the average US stone size was (10.1± 4.3) mm. US stone size overestimated CT stone size with a mean bias of （1.8±2.0）mm ,the mean bias of stones≤5 mm was the largest (2.5±1.6) mm .The difference between US size and CT size was statistically significant for stones ≤10 mm（P＜0.05）,however, there was no statistically significant difference between the US size and CT size for stones >10mm (P=0.289). Fourteen stones without obvious shadow ,of which nine(64.3%) stones were ≤5 mm，thirty-seven stones demonstrated a posterior acoustic shadow, for stones≤10 mm, the shadow size was closer to the CT size than the US size, and the difference was statistically significant (P<0.05). Conclusion directly measuring the hyperechoic width of the stone by US can overestimate the size compared to CT, especially for small calculi. Measurement of posterior acoustic shadow width of calculi is valuable for improving the accuracy of ultrasonic measurement of calculi size, but it needs further confirmation. |
| Key words: ultrasonography acoustic shadow kidney stones non-enhanced computed tomography |
