非增强螺旋CT低剂量扫描在泌尿系结石诊断中的可行性

Feasibility of unenhanced spiral CT scans with low dose in diagnosing the lithiasis of urinary system

目的探讨非增强螺旋CT低剂量扫描在诊断急性腰腹痛或怀疑泌尿系结石中的可行性。方法选择30例临床急性腰腹痛或怀疑患有泌尿系结石而未进行过螺旋CT扫描的患者进行常规剂量和低剂量扫描,扫描层厚10 mm,重叠重建1 mm,并进行MPR等后处理。对获得的图像进行诊断敏感性及准确性分析。结果图像经两名经验丰富的放射科医师进行了评估,所有低剂量扫描图像均获得成功。低剂量螺旋CT扫描中30例患者检出35枚结石,敏感性100%,准确性96.5%。结论研究表明,低剂量螺旋CT扫描对于泌尿系结石的诊断是安全并且敏感的,同时较常规剂量扫描明显减少了患者所接受的辐射剂量。

Objective To evaluate the feasibility of unenhanced spiral CT scans with low dose in diagnosing the lithiasis of urinary system.Methods Thirty patients with acute lumbar-flank and abdomen pain or clinically suspected lithiasis of urinary system underwent spiral CT scans with routine and low dose.The scanning procedures were performed by the section of 10 mm and overlapping reconstruction of 1 mm.Results All patients whose CT findings seen on routine and low dose scans were evaluated and compared by two experienced radiologists.The spiral CT scans with low dose detected 35 stones of urinary system in 30 patients,the diagnostic sensitivity and accuracy were 100% and 96.5%,respectively.Conclusion Spiral CT scan with low dose is a safe and sensitive modality in the diagnosis of lithiasis of urinary system,especially in comparising with routine dose scan,it could significantly reduce the radiation dose received by patients.