中国物理B ›› 2017, Vol. 26 ›› Issue (12): 124302-124302.doi: 10.1088/1674-1056/26/12/124302

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Lorentz force electrical impedance tomography using pulse compression technique

Zhi-shen Sun(孙直申), Guo-qiang Liu(刘国强), Hui Xia(夏慧)   

  1. 1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Université Lyon, Université Claude Bernard Lyon1, Centre Léon Bérard, Inserm, LabTAU UMR 1032, F-69003, Lyon, France
  • 收稿日期:2017-07-17 修回日期:2017-08-24 出版日期:2017-12-05 发布日期:2017-12-05
  • 通讯作者: Guo-qiang Liu E-mail:gqliu@mail.iee.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51137004 and 61427806), the Scientific Instrument and Equipment Development Project of Chinese Academy of Sciences (Grant No. YZ201507), and the China Scholarship Council (Grant No. 201604910849).

Lorentz force electrical impedance tomography using pulse compression technique

Zhi-shen Sun(孙直申)1,2,3, Guo-qiang Liu(刘国强)1,2, Hui Xia(夏慧)1   

  1. 1. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Université Lyon, Université Claude Bernard Lyon1, Centre Léon Bérard, Inserm, LabTAU UMR 1032, F-69003, Lyon, France
  • Received:2017-07-17 Revised:2017-08-24 Online:2017-12-05 Published:2017-12-05
  • Contact: Guo-qiang Liu E-mail:gqliu@mail.iee.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51137004 and 61427806), the Scientific Instrument and Equipment Development Project of Chinese Academy of Sciences (Grant No. YZ201507), and the China Scholarship Council (Grant No. 201604910849).

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摘要：

Lorentz force electrical impedance tomography (LFEIT) combines ultrasound stimulation and electromagnetic field detection with the goal of creating a high contrast and high resolution hybrid imaging modality. In this study, pulse compression working together with a linearly frequency modulated ultrasound pulse was investigated in LFEIT. Experiments were done on agar phantoms having the same level of electrical conductivity as soft biological tissues. The results showed that:(i) LFEIT using pulse compression could detect the location of the electrical conductivity variations precisely; (ii) LFEIT using pulse compression could get the same performance of detecting electrical conductivity variations as the traditional LFEIT using high voltage narrow pulse but reduce the peak stimulating power to the transducer by 25.5 dB; (iii) axial resolution of 1 mm could be obtained using modulation frequency bandwidth 2 MHz.

关键词: Lorentz force electrical impedance tomography, Hall effect imaging, magneto-acousto-electrical tomography, linear frequency-modulation, pulse compression

Abstract:

Lorentz force electrical impedance tomography (LFEIT) combines ultrasound stimulation and electromagnetic field detection with the goal of creating a high contrast and high resolution hybrid imaging modality. In this study, pulse compression working together with a linearly frequency modulated ultrasound pulse was investigated in LFEIT. Experiments were done on agar phantoms having the same level of electrical conductivity as soft biological tissues. The results showed that:(i) LFEIT using pulse compression could detect the location of the electrical conductivity variations precisely; (ii) LFEIT using pulse compression could get the same performance of detecting electrical conductivity variations as the traditional LFEIT using high voltage narrow pulse but reduce the peak stimulating power to the transducer by 25.5 dB; (iii) axial resolution of 1 mm could be obtained using modulation frequency bandwidth 2 MHz.

Key words: Lorentz force electrical impedance tomography, Hall effect imaging, magneto-acousto-electrical tomography, linear frequency-modulation, pulse compression

中图分类号:  (Bioacoustics)

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