【摘要】 目的评价双源双能量CT虚拟平扫(VNCT)泌尿系成像在在检查泌尿系统结石中的价值。方法选择91例临床怀疑泌尿系结石并行双源双能量CT检查的患者,包括全腹部常规平扫(CNCT)及增强动脉期检查、肾脏排泄期双能量扫描。比较CNCT和VNCT对泌尿系统结石的检出率、CT平均容积剂量指数(CT DIvol)和剂量长度乘积(DLP)。结果 CNCT、VNCT两种方法在肾内、输尿管腹段、输尿管盆段、输尿管膀胱壁内段和膀胱内的结石检出率比较,差异均无统计学意义(χ~2分别=0.29、0.12、0.26、0.25、-0.16,P均>0.05)。CT DIvol和DLP在CNCT、VNCT和DSCT动脉期的差异均有统计学意义(F分别=62.89、36.02,P均<0.05)。两两比较显示,CT DIvol和DLP在DSCT动脉期均高于CNCT和VNCT,差异有统计学意义(t分别=6.79、6.99、6.79、6.65,P均<0.05)。结论 VNCT与CNCT在泌尿系统结石检出率具有很高一致性。VNCT因减少一次扫描,可降低辐射剂量。更多还原

【Abstract】 Objective To evaluate the value of virtual non-enhanced technology of dual energy CT(VNCT) on detection of urinary calculi. Methods The VNCT was applied in 91 patients with undiagnosed urinary calculi including the conventional non-enhanced CT(CNCT) for general scan of the abdomen, the enhanced scan in arterial phase and the dual energy scan in renal excretion phase. The detection rates of urinary calculi, CT DIvol and DLP between VNCT and CNCT were compared. Results There were no statistical differences between CNCT and VNCT in the detection rates of urinary calculi in the kidney, the abdominal and pelvic sections of ureter, the inner wall of the ureter and bladder, and the bladder(χ~2=0.29,0.12,0.26,0.25,-0.16,P>0.05). The CT DIvol and DLP in CNCT, VNCT and DSCT in arterial phase were significantly different(F=62.89,36.02,P<0.05). The CT DIvol in DSCT in arterial phase was significantly higher than in CNCT and VNCT as well as DLP(t=6.79,6.99,6.79,6.65,P<0.05). Conclusion The VNCT has the same value on detection of urinary calculi with CNCT. The VNCT can reduce the radiation dose because of reducing once scan.更多还原