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Title:: Research on magneto-acoustic-electrical tomagraphy detection system using linear sweep method

作者:: 戴明1; 朱慧萍2△; 陈思平1△; 陈昕1; 陈冕1; 孙通1; 1. 深圳大学健康科学中心生物医学工程学院，广东深圳 518060；2. 南开大学深圳研究院，广东深圳 518060

Author(s):: DAI Ming1; ZHU Huiping2; CHEN Siping1; CHEN Xin1; CHEN Mian1 ; SUN Tong1; 1. School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China;2. Shenzhen Research Institute of Nan Kai University, Shenzhen 518060

Keywords:: Imaging algorithm; Signal processing; Electrode detection; Conductivity imaging; Ultrasonic excitation

摘要:: 本研究提出基于线性扫频激励洛伦兹力电阻抗成像理论，搭建了基于Verasonics磁声电导率检测平台，同时将线性扫频技术，混频及B模式扫描算法应用于电导率变化区域界面检测中，并对0.5% NaCl均匀仿体进行实验，验证了线性扫频理论应用于本系统的正确性，清晰获得仿体电导率曲线，测得均匀仿体电导率B模式扫描图与超声B模式图及实际测量值一致，此外，本研究还探讨了探头类型及扫频时宽对成像效果影响。

Abstract:: To propose magneto-acoustic-electrical tomagraphy( MAET) theory using linear sweep signal, and the MAET detection platform based on verasonics system was designed and implemented, linear sweep technology, mixing theory and B-mode scanning algorithm were applied for the region detection of conductivity variation, and the method of making uniform imitation was given. Furthermore, experiments were conducted on 0.5% NaCl homogeneous phantoms. It was verified our proposed method was correct and experimental results clearly showed the conductivity curves of homogeneous phantoms and conductivity B-scan graph were highly consistent with the ultrasonic B-scan graph and the actual physical size, and the effects of probe type and sweep time on resolution were discussed.