CT与超声在诊断下肢动脉闭塞性疾病中的价值

The value of CT and ultrasound in the diagnosis of lower extremity arterial occlusive disease

目的:探讨彩色多普勒超声和多层螺旋CT静脉成像对下肢动脉闭塞性疾病诊断的价值并进行对比研究。方法:36例下肢动脉闭塞性疾病患者分别接受下肢静脉超声和螺旋CT静脉成像检查,超声检查主要运用二维超声,并辅以多普勒技术和加压技术等。多层螺旋CT扫描后采用多平面重建及曲面重建等后处理技术显示下肢静脉。结果:超声示所有患者呈现下肢动脉管壁增粗、不规则增厚,内中膜厚>1.0mm;有大小不等、形态各异的粥样硬化斑,引起不同程度的狭窄。CDFI频谱示三相波形,似正常频谱,频带稍增宽,有声窗。CT检查,患者1次检查均可清晰成像,共检出闭塞血管段40条。结论:两种检查方法各有一定的误诊率,为了提高下肢动脉闭塞性疾病的检出率,在实际应用中应该取长补短,联合运用。

Objective： To evaluate the color Doppler ultrasound and spiral CT venography of the lower extremity arterial occlusive disease diagnosis and compared. Methods： 36 patients with lower extremity arterial occlusive disease received lower extremity venous ultrasound and helical CT venography examination, uhrasonography, the main use of two-dimensional ultrasound, supplemented by Doppler and compression technology. Multi-slice CT scan with multiplanar reconstruction and surface reconstruction of post-processing techniques such as deep vein show. Results： Ultrasound： All patients with lower extremity arterial intima irregular thickening, rough surface; medial thickening showed a strong echo of local spots, the rear with acoustic shadow, and surfaces of vascular intima, lumen diameter was irregular segmental stenosis. CT： patient 1 examination could clear imaging, there were 40 blocking blood vessels were found in paragraph. Conclusion： The two methods have some misdiagnosis rate, in order to improve lower extremity arterial occlusive disease, the detection rate should learn from each other in practical applications, the joint application.