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目的：探讨彩色多普勒血流显像(CDFI)检测下肢深静脉血栓的应用价值。方法对46例下肢深静脉血栓(DVT)患者，采用彩色多普勒超声诊断仪对下肢深静脉急、慢性血栓患者进行检查，观察其二维图像、彩色血流特点及频谱特征。结果46例患者的病变血管在二维超声图像、彩色多普勒血流显像以及频谱多普勒方面均有显著的特异性和敏感性。结论彩色多普勒超声检查准确、敏感、无创，是诊断下肢深静脉血栓的有效方法之一，值得临床推广应用。“,”Objective To study the color Doppler flow imaging (CDFI) Detection of deep venous thrombosis of the application. Methods 46 patients with lower extremity deep venous thrombosis (DVT) in patients using color Doppler ultrasonic diagnostic apparatus of the lower extremity deep venous acute and chronic thrombosis in patients with inspection, observation of its two-dimensional images, color flow characteristics and spectral characteristics. Results 46 patients with vascular lesions in the two-dimensional ultrasound image, color Doppler flow imaging and spectral Doppler area showed a significant specificity and sensitivity. Conclusion Color Doppler ultrasound accurate, sensitive, non-invasive diagnosis of deep venous thrombosis is one ef ective method worthy of clinical application.