下肢动脉硬化闭塞症的多层螺旋(HD750)CTA和3.0T磁共振3DCE-MRA的对比研究

目的对比研究多排螺旋增强血管造影CTA和自动移床三维动态增强磁共振血管造影3D CE-MRA对诊断下肢动脉硬化闭塞症的应用价值。方法收集2012年5月-2014年11月共38例下肢动脉硬化闭塞症患者,每例患者在不超过2周期间内都进行了HD750 CTA和3.0T 3D CE-MRA检查,其中15例同期进行了DSA检查。回复性分析相关患者影像数据,并对每例双侧下肢动脉划分为3个区域、23个节段的CTA和CE-MRA进行多种后重建图像进行比较。结果全部病例的CTA和CE-MRA均可以准确评估下肢动脉硬化闭塞部位及程度,共显示轻度狭窄8例,中度狭窄14例,重度狭窄12例和4例动脉闭塞,符合临床诊断要求。MRA对狭窄程度评估更准确,CTA对于附壁斑块的显示及斑块成分的评估有优势。结论 CTA和3D CE-MRA对诊断下肢动脉硬化闭塞症的的评估都是可靠和准确的,二者各有优势,互补使用可为临床提供更多的诊断信息,能够为临床采取及时有效的治疗提供更准确可靠的影像依据。

Compariative Study of multi-slices helical (HD 750) CT Angiography and 3.0T Three Dimensional Dynamic Contrast-Enhanced MRA in Lower Extremities Arteriosclerotic Occlusive Disease

Objective To evaluate the study value of multi-slices helical CT angiography and three dimensional dynamic contrast-enhanced MRA in lower extremities arteriosclerotic occlusion disease(ASO).Methods 38 cases of ASO were performed with MS CTA and 3D CE-MRA between two weeks. The CT original axial data was reconstructed by ADW4.6 workstation of MPR, MIP and VR, compared with processed MIP images with MRI. Bilateral lower extremity arterial vascular system of each case was divided into three regions and 23 segments, each segment was evaluated for the presence and degree of vascular stenosis.Results All the 38 cases including 8 cases with mild stenosis, 14 cases with moderate syenosis, 12 cases with significant stenosis and 4 cases with occlusion. The significant disease of the lower extremities were demonstrated clearly by MS CTA and 3D CE-MRA.Conclusion MS CTA and 3D CE-MRA are excellent in patients with clinical symptoms of the arteriosclerotic occlusive disease of lower extremity, which can provide more accurate informations for clinical diagnosis and treatment.