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目的:探讨多层螺旋CT血管成像对下肢动脉粥样硬化的诊断价值。方法:选择临床可疑下肢动脉粥样硬化性疾病患者21例作为研究对象,采用GE LightSpeed 64层螺旋CT对全下肢动脉进行CTA扫描,将获得的原始数据传入AW4.2P后处理工作站,血管重建技术包括VR、MIP、MPR及CPR,血管狭窄程度的评估采用智能血管分析与目测法相结合。结果:21例患者共显示血管336段,均获得了清晰的血管重建图像,全部满足诊断要求。除5例患者下肢动脉CTA表现正常外,其余16例均发现不同程度的粥样硬化斑块。336段血管中,7段有脂质纤维性斑块,27段有钙化斑块,222段显示广泛的混合性斑块;其中完全闭塞占4.46%;重度狭窄7.14%;中度狭窄31.8%;轻度狭窄32.7%;无明显狭窄者23.8%。结论:64层MSCT血管成像对下肢动脉粥样硬化的诊断具有很高准确性,各种血管重建技术的联合应用能够提供更多的诊断信息,有助于临床治疗方案的选择。
Objective: To investigate the value of multislice CT angiography in the diagnosis of atherosclerosis in the lower extremities. Methods: Twenty-one patients with clinically suspected atherosclerotic lower extremity atherosclerosis were selected as the study subjects. All the lower extremity arteries were scanned by CTA with GE LightSpeed 64-slice spiral CT. The obtained raw data were sent to the AW4.2P post-treatment workstation. Technology includes VR, MIP, MPR and CPR. The assessment of the degree of stenosis is based on a combination of intelligent blood vessel analysis and visual inspection. Results: A total of 336 vessels were found in 21 patients, all of which obtained clear images of revascularization, all meeting the diagnostic requirements. In addition to the 5 cases of lower extremity artery CTA showed normal performance, the remaining 16 cases were found to varying degrees of atherosclerotic plaque. Of the 336 blood vessels, 7 had lipid fibrotic plaque, 27 had calcified plaque, and 222 showed extensive mixed plaque. The complete occlusion accounted for 4.46%, severe stenosis 7.14%, moderate stenosis 31.8% Mild stenosis 32.7%; no obvious stenosis 23.8%. Conclusion: 64-slice MSCT angiography has high accuracy for the diagnosis of atherosclerosis in the lower extremities. The combination of various vascular reconstruction techniques can provide more diagnostic information and is helpful for the selection of clinical treatment options.