[1]School of Mechanical Engineering,and the Center for Optical Imagery Analysis and Learning,Northwestern Polytechnical University,Xi’an 710072,China;
[2]School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510641,China;
[3]School of Computer Science and Center for OPTical IMagery Analysis and Learning(OPTIMAL),Northwestern Polytechnical University,Xi’an 710072,China;
School; USA; Automatic ultrasound scanning system based on robotic arm;