研究单位：[1]Xuanwu Hospital,Beijing[2]The First Affiliated Hospital of Soochow University[3]The First Hospital of Jilin University[4]The First Affiliated Hospital of Shanxi Medical University[5]The Second People's Hospital of Liaocheng[6]Liaocheng Brains Hospital[7]LanZhou University[8]First Hospital of China Medical University[9]Dalian Municipal Central Hospital[10]Peking University Third Hospital[11]The Affiliated Hospital of Inner Mongolia Medical University[12]Henan Provincial People's Hospital[13]Shengli Oilfield Hospital[14]Zhengzhou First People's Hospital[15]Weihai Municipal Hospital
研究目的：
The purpose of this multiple-center study are: 1) To establish the ultrasound criteria for evaluating vulnerable plaques by comparing the plaque echo characteristics before CEA (carotid artery endarterectomy) and plaque specimen after CEA.
2) To establish the carotid artery recanalization strategies based on the evaluation results of carotid artery and intracranial artery by color doppler flow imaging and TCCS/TCD (transcranial color coded sonography/transcranial doppler).
3) To compare the success rate and the incidence of restenosis between CEA and carotid artery stenting.
