中国物理B ›› 2026, Vol. 35 ›› Issue (5): 54302-054302.doi: 10.1088/1674-1056/ae089a

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Advanced magneto-acousto-electrical tomography based on circular arrays of omnidirectional transducers and orthogonally oriented electrodes

Peixia Li(李培霞)1, Wei Chen(陈伟)1, Hao Qian(钱昊)1, Yulong Zhou(周瑜龙)2, Gepu Guo(郭各朴)1,†, Juan Tu(屠娟)3, Dong Zhang(章东)3, and Qingyu Ma(马青玉)1,‡   

  1. 1 School of Computer and Electronic Information, Nanjing Normal University, Nanjing 210023, China;
    2 School of Information Engineering, Taizhou College, Nanjing Normal University, Taizhou 225300, China;
    3 Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2025-08-21 修回日期:2025-09-14 接受日期:2025-09-18 发布日期:2026-05-11
  • 通讯作者: Gepu Guo, Qingyu Ma E-mail:guogepu@njnu.edu.cn;maqingyu@njnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12227808 and 12174198), the Natural Science Foundation of Jiangsu Province (Grant No. BE2022814), Qing Lan Project of Jiangsu Province, and Universal Technology for Primary and Secondary Schools, National Research Institute for Teaching Materials.

Advanced magneto-acousto-electrical tomography based on circular arrays of omnidirectional transducers and orthogonally oriented electrodes

Peixia Li(李培霞)1, Wei Chen(陈伟)1, Hao Qian(钱昊)1, Yulong Zhou(周瑜龙)2, Gepu Guo(郭各朴)1,†, Juan Tu(屠娟)3, Dong Zhang(章东)3, and Qingyu Ma(马青玉)1,‡   

  1. 1 School of Computer and Electronic Information, Nanjing Normal University, Nanjing 210023, China;
    2 School of Information Engineering, Taizhou College, Nanjing Normal University, Taizhou 225300, China;
    3 Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • Received:2025-08-21 Revised:2025-09-14 Accepted:2025-09-18 Published:2026-05-11
  • Contact: Gepu Guo, Qingyu Ma E-mail:guogepu@njnu.edu.cn;maqingyu@njnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12227808 and 12174198), the Natural Science Foundation of Jiangsu Province (Grant No. BE2022814), Qing Lan Project of Jiangsu Province, and Universal Technology for Primary and Secondary Schools, National Research Institute for Teaching Materials.

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摘要： Magneto-acousto-electrical tomography (MAET) is a promising imaging modality capable of visualizing electrical conductivity variations in tissues. However, its imaging quality and efficiency are often compromised by the mechanical rotation and scanning processes. An advanced MAET approach that employs cyclic excitation of omnidirectional transducers and synchronous detection with orthogonally oriented electrodes is presented. The principle of MAE measurement regarding acoustic excitation and electrical detection at arbitrary positions is derived. It confirms that the signal attenuation originates from the cosine product of the angles between the conductivity boundary and the positions of the transducer and electrode. A new tomographic algorithm utilizing amplitude summation for electrodedetected signals is developed, and it is further refined through the application of square-amplitude summation for orthogonally oriented electrodes. The performance improvement is validated by accurate reconstruction of an eccentrically positioned cylindrical model, using an optimized experimental system comprising 32 sources and 4 electrodes. These promising results demonstrate that the efficiency, stability, and quality of MAET can be substantially enhanced through electrically controlled cyclic excitation and synchronous detection, thereby eliminating the need for mechanical activities. By integrating MAET with ultrasonic CT, a novel dual-modality imaging strategy that leverages both electrical and acoustic impedances can be further advanced.

关键词: magneto-acousto-electrical tomography, omnidirectional sources, orthogonally oriented electrodes, image reconstruction algorithm, system optimization

Abstract: Magneto-acousto-electrical tomography (MAET) is a promising imaging modality capable of visualizing electrical conductivity variations in tissues. However, its imaging quality and efficiency are often compromised by the mechanical rotation and scanning processes. An advanced MAET approach that employs cyclic excitation of omnidirectional transducers and synchronous detection with orthogonally oriented electrodes is presented. The principle of MAE measurement regarding acoustic excitation and electrical detection at arbitrary positions is derived. It confirms that the signal attenuation originates from the cosine product of the angles between the conductivity boundary and the positions of the transducer and electrode. A new tomographic algorithm utilizing amplitude summation for electrodedetected signals is developed, and it is further refined through the application of square-amplitude summation for orthogonally oriented electrodes. The performance improvement is validated by accurate reconstruction of an eccentrically positioned cylindrical model, using an optimized experimental system comprising 32 sources and 4 electrodes. These promising results demonstrate that the efficiency, stability, and quality of MAET can be substantially enhanced through electrically controlled cyclic excitation and synchronous detection, thereby eliminating the need for mechanical activities. By integrating MAET with ultrasonic CT, a novel dual-modality imaging strategy that leverages both electrical and acoustic impedances can be further advanced.

Key words: magneto-acousto-electrical tomography, omnidirectional sources, orthogonally oriented electrodes, image reconstruction algorithm, system optimization

中图分类号:  (Acoustical measurement methods in biological systems and media)

  • 43.80.Ev
72.55.+s (Magnetoacoustic effects) 73.50.Rb (Acoustoelectric and magnetoacoustic effects)