输尿管末端小结石的CT诊断

目的:通过对输尿管末端小结石的CT平扫,探讨其CT检查的临床应用价值。方法:对54例输尿管末端小结石患者行CT平扫检查,所有病例均经尿道排石证实。结果:输尿管末端小结石具有特征性CT表现,即钙化点样高密度影,小结石直径均<8.0mm,CT值≥85HU,CT确诊率98%(53/54);54例均发现病侧输尿管增粗,45例发现肾盂少量积水,肾盂未见积水而输尿管末端发现小结石的9例,且结石直径均<4.0mm。结论:CT具有准确、无创等优点,是目前确诊输尿管末端小结石最有效的检查方法,同时应注意扫描方法和鉴别诊断。

CT Diagnosis of Ureteral Calculus at the Distal End of Ureters

Objective:To study the CT diagnosis of ureteral calculus at the distal end of ureter.Methods:54 cases of ureteral calculus were examined by CT scanning.All cases were proved by clinical therapeutic results.Results:Ureteral calculuses were showed as high density on CT scanning.The CT values of the ureteral calculuses less than 8.0mm in diameter were beyond 85HU.The detection rate by CT was 98% (53/54).In all the 54 cases,ureters with calculuses were found dilated and 45 cases with nephrohydrosis.In 9 cases,calculuses less than 4.0mm in diameter were found,but no nephrohydrosis.Conclusion:CT is the most valuable way to diagnose ureteral calculus at the lower end of ureter.Appropriate methods of CT scanning are essential,and differential diagnosis should be considered.