摘要
目的：探讨非增强螺旋CT（NCHCT）对泌尿系结石的诊断价值。方法：对50例急性腰腹部绞痛而怀疑泌尿系结石患者行NCHCT检查,并同时行泌尿系B超检查作对照,对检查结果进行临床随访,随访3天-3个月（平均0.5个月）。结果：38例患者被证实为泌尿系结石（3例保守治疗后自行排出结石,28例经体外冲击波碎石后排出结石证实,7例手术取出结石）,NCHCT诊断泌尿系结石38例;B超诊断泌尿系结石28例,1例假阳性。NCHCT与B超诊断泌尿系结石的敏感度分别为100%、73.7%,特异度分别为100%、91.7%,阳性预测值分别为100%、96.6%,阴性预测值分别为100%、52.4%,约登指数（正确指数）分别为1.0、0.65,NCHCT与B超相比较（u=3.23,P〈0.01）,差异具有显著性意义。结论：NCHCT诊断泌尿系结石比B超具有更高的敏感度和特异度,可作为临床怀疑泌尿系结石、尤其是急性肾绞痛患者的常规检查方法。
Objective：To compare the value of noncontrast helical CT （NCHCT） and US in detecting urinary calculi. Methods： A total of 50 patients with acute renal colic were evaluated with NCHCT and US for detection of urinary calculi. All cases were followed up ranging from 3 days to 3 months （mean 0.5 month） of whom 38 had a calculus confirmed by spontaneous stone passage,stone passage after ESWL or surgical removal. Results： CT revealed all 38 calculi （sensitivity, 100 % ） and no calculus in the other 12 patients （specificity, 100 % ）. US demonstrated 28 calculi （sensitivity, 73.70% ） and no calculus in 11 of 12 patients （specificity, 91.7 %）. Positive predictive value of NCHCT and US was 100 % and 96.6 %, respectively and negative predictive value was 100 % and 52. 4 %, respectively. Youden index of NCHCT and US was 1.0 and 0.65, respectively. Differences in accuracy of NCHCT and US were statistically significant （u ： 3.23, P〈0.01 ）. Conclusion： NCHCT is more accurate than US in detecting urinary calculi and is the imaging method of choice in the assessment of patients with acute renal colic.
出处
《放射学实践》
2007年第6期594-596,共3页
Radiologic Practice
