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Outward Electrical Impedance Tomography (OEIT) enables non-invasive imaging of arterial walls for atherosclerosis detection, overcoming the high costs and portability issues of traditional Electrical Impedance Tomography (EIT). This paper presents a $30, portable 16-channel OEIT system using ADUM1400, ADG1606, and STM32H7 microcontroller, integrated with a 16-electrode inflatable catheter. It achieves a 74.71 dB signal-to-noise ratio (SNR), 50 fps frame rate, and high linearity ( \(R^2 largerthan \) 0.99) in impedance measurements. Ex vivo tests on 50 porcine aortas distinguish lipid plaques (0.21 S/m), normal tissue (0.45 S/m), and calcified lesions (0.08 S/m). The compact, modular design suits bedside and field use, with potential for clinical atherosclerosis imaging.

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Outward Electrical Impedance Tomography for Atherosclerotic Arterial Wall Detection

  • 会议论文

  • 发表日期：

    2026年

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  • Yanbo Hu,
  • Zhenyu Cheng,
  • Yichen Lin,
  • Xiaojing Long

摘要

Outward Electrical Impedance Tomography (OEIT) enables non-invasive imaging of arterial walls for atherosclerosis detection, overcoming the high costs and portability issues of traditional Electrical Impedance Tomography (EIT). This paper presents a $30, portable 16-channel OEIT system using ADUM1400, ADG1606, and STM32H7 microcontroller, integrated with a 16-electrode inflatable catheter. It achieves a 74.71 dB signal-to-noise ratio (SNR), 50 fps frame rate, and high linearity ( \(R^2 largerthan \) 0.99) in impedance measurements. Ex vivo tests on 50 porcine aortas distinguish lipid plaques (0.21 S/m), normal tissue (0.45 S/m), and calcified lesions (0.08 S/m). The compact, modular design suits bedside and field use, with potential for clinical atherosclerosis imaging.