Kotre C J
Regional Medical Physics Department, Newcastle General Hospital, Newcastle-upon-Tyne, UK.
Br J Radiol. 1997 Nov;70 Spec No:S200-5. doi: 10.1259/bjr.1997.0025.
Electrical impedance tomography (EIT) is a technique which allows cross-sectional images related to the local electrical impedance within an object to be reconstructed from sets of measurements made on its surface. The main drive behind the development of EIT has been its possible application in medical imaging, as biological tissues are known to exhibit a wide range of electrical impedance and many physiological events are accompanied by electrical impedance changes. This article reviews the technical aspects of EIT as a medical imaging modality, and considers the range of applications over which it might be employed. Existing technical limitations and future developments are discussed. It is concluded that the future of EIT as a clinical diagnostic tool is likely to lie in the area of functional monitoring, where the capability of performing image-guided localized electrical impedance measurements with high acquisition speed, good sensitivity and no hazard can be exploited.
电阻抗断层成像（EIT）是一种技术，它能够根据在物体表面进行的一系列测量结果，重建与该物体内部局部电阻抗相关的横截面图像。EIT 发展背后的主要驱动力在于其在医学成像中的潜在应用，因为已知生物组织具有广泛的电阻抗，并且许多生理事件都伴随着电阻抗的变化。本文回顾了 EIT 作为一种医学成像模态的技术方面，并考虑了其可能应用的范围。讨论了现有的技术局限性和未来的发展。得出的结论是，EIT 作为临床诊断工具的未来可能在于功能监测领域，在该领域中，可以利用其以高采集速度、良好的灵敏度且无危害地进行图像引导的局部电阻抗测量的能力。
