Forty three out of 49 cases demonstrated radioluscent calculus on CT scan (87.7%), of which 29 cases showed soft tissue rim sign (67.4%).

• 然后针对拟诊输尿管阴性结石的感兴趣区作6cm长度的CT平扫。 结果：2例因阴性结石染色明确诊断外，49例经CT显示结石者43例，检出率占87.；7%25，其中29例出现结石伴输尿管软组织轮缘征，占67