1. School of Computer Science, Northwestern Polytechnical University, Xi’an 710129, China
2. School of Artificial Intelligence, OPtics and ElectroNics (iOPEN), Northwestern Polytechnical University, Xi’an 710072, China
3. Department of Ultrasound, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, China
4. Department of Ultrasound, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China