This paper describes a simple and reproducible method for universal evaluation of the performance of electrical impedance tomography (EIT) systems using reconstructed images. To address the issues where common electrical parameters are not directly related to the quality of EIT images, based on objective full reference (FR) image quality assessment, the method provides a visually distinguishable hot colormap and two new FR metrics, the global and the more specific ‘region of interest’. A passive 16 electrode EIT system using an application specific integrated circuit front-end was used to evaluate the proposed method. The measured results show, both visually and in terms of the proposed FR metrics, the impact on recorded EIT images with different design parameters and non-idealities. The paper also compares the image results of a passive electrode system with a matched ‘single variable’ active electrode system and demonstrates the merit of an active electrode system for noise interference. A figure of merit based on the FR metrics is proposed.

中文翻译：

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一种基于图像的电阻抗断层扫描系统通用性能评估方法

本文介绍了一种使用重建图像对电阻抗断层扫描 (EIT) 系统的性能进行普遍评估的简单且可重复的方法。为了解决常见的电参数与 EIT 图像质量没有直接关系的问题，基于客观全参考 (FR) 图像质量评估，该方法提供了一个视觉上可区分的热色图和两个新的 FR 度量，全局和更多特定的“感兴趣区域”。使用专用集成电路前端的无源 16 电极 EIT 系统用于评估所提出的方法。测量结果在视觉上和建议的 FR 指标方面都显示了对不同设计参数和非理想情况下记录的 EIT 图像的影响。该论文还比较了无源电极系统与匹配的“单可变”有源电极系统的图像结果，并证明了有源电极系统在噪声干扰方面的优势。提出了基于 FR 度量的品质因数。