There has been considerable interest in electrical impedance tomography (EIT) to provide low-cost, radiation-free, real-time and wearable means for physiological status monitoring. To be competitive with other well-established imaging modalities, it is important to understand the requirements of the specific application and determine a suitable system design. This paper presents an overview of EIT circuits and systems including architectures, current drivers, analog front-end and demodulation circuits, with emphasis on integrated circuit implementations. Commonly used circuit topologies are detailed, and tradeoffs are discussed to aid in choosing an appropriate design based on the application and system priorities. The paper also describes a number of integrated EIT systems for biomedical applications, as well as discussing current challenges and possible future directions.

中文翻译：

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用于生物医学应用的电阻抗层析成像：电路和系统评论

为了提供低成本，无辐射，实时且可穿戴的生理状态监测手段，电阻抗断层扫描（EIT）引起了人们的极大兴趣。为了与其他公认的成像方式竞争，重要的是要了解特定应用的要求并确定合适的系统设计。本文概述了EIT电路和系统，包括体系结构，电流驱动器，模拟前端和解调电路，重点是集成电路的实现。详细介绍了常用的电路拓扑，并讨论了一些折衷方法，以帮助根据应用和系统优先级选择合适的设计。本文还介绍了许多用于生物医学应用的集成EIT系统，