Imaging with electricity: Report of the European Concerted Action on Impedance Tomography

Despite its obvious advantage of low cost, safety and portability compared to other techniques, and its independence from ionizing radiation, electric impedance tomography (EIT) has not yet been adopted as a routine diagnostic tool due to some reasons. Many researchers are reluctant to invest considerable time and resources on clinical validation of the technology which is in a state of rapid development. Moreover, EIT's spatial resolution is relatively poor compared to that of other techniques and its images show considerable inter-subject variability. It is likely that multiple-frequency imaging will allow to distinguish between different tissue types in the same subject, improving the range of the technology's applications.