八通道高速电阻断层扫描装置,在芯片上的可编程系统上实现
Fausto Andrés Escobar1, Carlos Felipe Rengifo2, Víctor Hugo Mosquera2
1Universidad Mariana, Street 18 No. 34-104, Pasto, Nariño, Colombia.
HardwareX
|July 24, 2025
概括
本研究介绍了一种使用可编程芯片系统 (PSoC) 的电阻断层扫描 (EIT) 装置. EIT-PSoC系统有效地监测生物流体体积和导电性变化.
科学领域:
- 生物医学工程 生物医学工程
- 电气工程 电气工程
- 医疗成像医学成像
背景情况:
- 电阻断层扫描 (EIT) 是一种非侵入性成像技术.
- 监测生物液体体积和导电性对于诊断至关重要.
- 现有的EIT系统在可移植性和成本方面可能存在局限性.
研究的目的:
- 开发和评估一种使用可编程芯片系统 (PSoC) 的新型EIT设备.
- 评估EIT-PSoC系统在频率,精度和信号噪声比方面的性能.
- 为了验证系统在检测生物流体幽灵阻抗变化的能力.
主要方法:
- 使用两个PSoC 5LP平台实施一个EIT系统.
- 使用电阻幻影进行表征,以测量频率 (fps),精度 (Ac) 和信号与噪声比 (SNR).
- 使用盐水和亚格假象进行评估,以评估阻抗分布变化和生物流体仿真.
主要成果:
- 实现了100/秒的频率,中位数SNR为63.59dB,以及95.39%的精度与50kHz的正弦电流.
- 通过EIT图像重建,成功区分了盐液幻象中的阻抗变化.
- 通过 agar 幻象和全球阻抗指数 (GI) 证明了体积和导电率变化的检测.
结论:
- 该EIT-PSoC系统为阻抗成像提供了一个有前途的,高性能解决方案.
- 开发的系统准确地检测流体体积和导电率的变化.
- 这种基于PSoC的EIT设备为生物流体监测应用提供了可行的替代方案.
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