中文摘要：

目的应用超声弹性成像技术评价不同阶段下肢深静脉血栓（DVT）的弹性变化。方法根据临床症状和常规超声检查诊断为DVT的49例患者入选,根据患者症状开始时间将其分为急性期、亚急性期和慢性期血栓组。观察不同时期血栓的超声弹性图像特点,计算不同阶段血栓的应变比值（静脉周围肌肉组织/血栓）并进行比较。结果 （1）超声弹性成像显示,急性期血栓主要表现为红色,亚急性期血栓主要表现为绿色,慢性期血栓主要显示为蓝色。（2）慢性血栓组及亚急性血栓组的应变比值高于急性血栓组（P〈0.001,P〈0.05）,慢性血栓组应变比值高于亚急性血栓组（P〈0.05）。结论不同阶段血栓的超声弹性成像表现、血栓与周围肌肉组织的应变比值不同,超声弹性成像技术可用于评价不同阶段下肢深静脉血栓的硬度变化,对于血栓治疗方案的选择和预测并发症的发生具有一定的临床意义。

英文摘要：

Objective To use ultrasound elasticity imaging （UEI） technology for evaluating the elasticity changes of the deep vein thrombosis （DVT） at different stages.Methods Conventional ultrasonic diagnoses were performed in 49 patients with DVT and the patients were divided into acute stage,sub-acute stage,and chronic stage.The elastic image characteristics of the thrombosis were observed at different stages and the strain ratio （B/A） between the muscle tissue around the vein and the thrombosis was calculated.Results （1） In ultrasound elasticity image,the acute thrombosis was mainly red,the sub-acute thrombosis was green,and the chronic thrombosis was blue.（2）The strain ratio of the sub-acute thrombosis group and the chronic thrombosis group were significantly higher than that of the acute thrombosis group（P〈0.001,P〈0.05）,and the strain ratio of the chronic thrombosis group was significantly higher than that of the sub-acute thrombosis group（P〈0.05）.Conclusion UEI technology can be used to evaluate the elastic changes in different stages of the deep vein thrombosis,and it can help to select treatments for thrombosis and predicting the complications.