摘要
目的以常规DSA和三维旋转DSA为参照标准,评价双源CT数字减影去骨CT血管成像(DS-BR-CTA)和双能量直接去骨CTA(DE-CTA)诊断颅内动脉瘤的价值。方法190例患者接受DS-BR-CTA检查,74例患者接受DE-CTA检查。以3D-DSA为标准,以患者和发生部位为单位,计算DS-BR-CTA和DE-CTA诊断颅内动脉瘤的敏感性、特异性、阳性预测值(PPV)和阴性预测值(NPV)。结果DS-BR-CTA诊断敏感性和特异性分别为96.90%、98.36%;97.37%、99.97%;对≤3.0mm的动脉瘤,其诊断敏感性高达88.89%,特异性达98.36%;DE-CTA检测颅内动脉瘤的诊断敏感性和特异性分别为98.25%、100%;95.52%、100%,对≤3.0mm动脉瘤的敏感性为90.91%,特异性为100%。结论双源CT的DE-CTA诊断颅内动脉瘤的准确性与DS-BR-CTA相当,可作为常规技术用于颅内动脉瘤的诊断流程中。
Objective To evaluate the diagnostic accuracy of digital subtraction bone removal CT angiography （DS-BR- CTA） and dual energy bone removal CTA （DE-CTA） compared with conventional and rotational DSA. Methods A total of 264 patients underwent 3D-DSA were enrolled, 190 of them underwent also DS-BR-CTA, while 74 underwent DE-CTA as well. Aneurysms detected with DS-BR-CTA and DE-CTA were analyzed compared with 3D-DSA on per-patient and per-an- eurysm basis. The sensitivity, specificity, positive predictive value and negative predictive value of two methods for diagno- sis of aneurysm were calculated. Results Taking DSA as the standard, the sensitivity and specificity of DS-BR-CTA to detect intracranial aneurysms was 96.90% and 98.36% on per-patient basis, while 97.37% and 99.97% on per-aneurysm basis, and the sensitivity and specificity for the detection of aneurysm ≤3 mm was 88. 89% and 98.36%. The sensitivity and specificity of DS-BR-CTA to detect intracranial aneurysms was 98.25% and 100% on per-patient basis, 95. 52% and 100% on per-aneurysm basis, and the sensitivity and specificity for the detection of aneurysm ≤3 mm was 90.91% and 100%. Conclusion DE-CTA has a comparable diagnostic accuracy with DS-BR-CTA to diagnose intracranial aneurysms, and can be used in the routine workflow for detection of intracranial aneurysms.
出处
《中国医学影像技术》
CSCD
北大核心
2009年第10期1773-1776,共4页
Chinese Journal of Medical Imaging Technology
