作者对216例急性腹痛或可疑肾绞痛病人行螺旋CT(SCT)平扫检查,分析“尾样征”的CT表现,进而对“尾样征”在输尿管结石与静脉石鉴别中的价值进行评价。SCT扫描采用5mm准直,床速8mm/s,螺距(pitch)=1.6,120kV,200mA,扫描范围从肾上极至膀胱底,分2～3次屏气完成扫描,不使用静脉或口服对比剂。横断面影像以3mm间隔重建,均以软组织窗观察,窗宽450HU,窗位50HU。全部CT图像均由两位放射学专家判读,按照钙化在输尿管 The author of 216 cases of acute abdominal pain or suspicious renal colic patients with spiral CT (SCT) plain scan, the “tail-like sign” of the CT findings, and then the “tail-like sign” in the identification of ureteral calculi and vein stone value Evaluation. SCT scanning using 5mm collimation, bed speed 8mm / s, pitch = 1.6,120kV, 200mA, the scope of the scan from the upper kidney to the bladder at the end, divided into 2 or 3 breaths to complete the scan, do not use intravenous or oral contrast agent . The cross-sectional images were reconstructed at 3 mm intervals, both of which were observed with soft tissue windows with a window width of 450HU and a window level of 50HU. All CT images were interpreted by two radiologists in accordance with calcification in the ureter