大螺距,低电压双源CT下肢动脉成像与DSA的对照研究  

High-pitch,Low Voltage Dual-source CT Angiography of the Aorto-iliac System and Lower Extremity Vessels:Diagnostic Accuracy in Comparison with Digital Subtraction Angiography

作　　者：许权[1] 周文珍[1] 王薇[1] 赵晓静[1] 郑少青 刘浩[1] XU Quan;ZHOU Wen-zhen;WANG Wei;ZHAO Xiao-jing;ZHENG Shao-qing;LIU Hao(Department of Radiology,Nanjing First Hospital,Nanjing Medical University,Affiliated Nanjing Hospital of Nanjing Medical University,Jiangsu 210006,China)

机构地区：[1]南京医科大学附属南京医院(南京市第一医院)医学影像科,江苏南京210006

出　　处：《中国CT和MRI杂志》2023年第9期164-166,共3页Chinese Journal of CT and MRI

摘　　要：目的评价低电压,大螺距双源CT下肢动脉成像诊断准确性。方法60例怀疑下肢动脉病变患者分为两组:A组,30例患者,扫描方案为大螺距(3.0),80kVp,迭代重建。B组螺距(1.0),120kVp,滤过反投影法重建。比较两组CT血管成像辐射剂量及图像质量。对照数字血管造影(DSA)评价A组的诊断准确性。结果两组CT图像质量评分无统计学意义(P>0.05)。与DSA对照,A组CTA对下肢动脉狭窄度的诊断敏感性、特异性、准确性、阳性预测值(PPV)及阴性预测值(NPV)分别为98.0%,97.4%,97.6%,95.0%,99.0%,对照DSA检查无统计学差异(P>0.05)。两组CTA剂量长度乘积存在统计学差异(A组:152.36±14.31 mGy×cm,B组:804.64±87.21 mGy×cm,P<0.001)。结论80千伏,大螺距双源CT下肢动脉成像有较高的诊断准确率,同时大幅降低辐射剂量。Objective To evaluate the diagnostic accuracy of high-pitch low voltage CTangiography(CTA)of the aortoiliac system and lower extremities.Methods A total of 60 patients with suspected the aorto-iliac system and lower extremities arterial disease were divided into two groups:Group A[30patients,80 kVp,high pitch(3.0)]and Group B[30 patients,120 kVp,low pitch(1.0)].DSA represented the standard of reference.The image quality and radiation dose of CTA were compared.Results The image quality rating of two groups was no difference(P>0.05).In the assessment of degree of stenoses compared with DSA,the ensitivity,specificity,accuracy,positive predictive value and negative predictive value of CTA using high-pitch were98.0%,97.4%,97.6%,95.0%,and 99.0%respectively.The dose length product was significantly lower in group A(152.36±14.31 mGy x cmvs.804.64±87.21mSv,P<0.001).Conclusion The high-pitch 80kVp CTA of the aorto-iliac system and lower extremities provides good diagnostic accuracy on peripheral arterial occlusive disease compared with DSA as well as reduces radiation exposure.

关 键 词：小剂量测试 大螺距 低千伏 CT血管成像 放射剂量 数字血管造影 

分 类 号：R826.61[医药卫生—临床医学]