国家重大科学仪器设备开发专项2011YQ03011409;国家“十二五”科技支撑项目2014BAA03B03;北京大学医工结合建设项目 BMU20140401Fund programNational Special Fund for the Development of Major Research Equipment and Instru-ment 2011YQ03011409;National Science and Technology Infrastructure Program during the 12th Five-Year Plan Period 2014BAA03B03;Program for the Medicine and Engineering Combination of Peking U-niversity BMU20140401