EIT Basic Principles

EIectrical
Impedance
Tomography
(EIT)

EIT is a medical imaging technology that obtains impedance changes through corresponding imaging algorithm by giving low intensity current and measuring surface voltages through attaching electrodes around chest.

Since thoracic EIT is capable of detecting physiological and pathological changes of electrical properties of lung tissue at very high scan rates, it allows the assessment of regional distribution of lung ventilation and perfusion as well as of changesin regional lung aeration and fluid content.*

* Adler, A., & Holder, D. (Eds.). (2021). Electrical impedance tomography: Methods, history, and applications (2nd ed.). Springer.

EIT History & Development

In 1978, Professors Henderson and Webster from the United States first proposed the clinical use of EIT for monitoring lung ventilation.

In 1987, Professors Barber and Brown from the University of Sheffield, UK, established the first complete DMS-Mark I System.

In 1995, Professors Brown and Smith from the University of Sheffield, UK, established the Mark II system suitable for human research.

In 1999, research on three-dimensional EIT images began.

In 2012 the German company Dräger launched the first EIT product for clinical use, obtaining European certification.

After 2010, more companies like Infivision successively introduced registered EIT products.

EIT Functional Imaging Comparison
Ventilation:
Change of impedance caused by gas detected and reconstructed into medical image.
Perfusion:
Change of impedance caused by pulsatility which was detected and reconstructed into medical image.
EIT vs Structure Imaging

The Infivision ET1000 demonstrates strong consistency with traditional imaging tools across various diseases.

ARDS (Compared with X-ray)
Pleural Effusion (Compared with CT)
Hemothorax (Compared with Ultrasound)

Meanwhile, Infivision ET1000 has specific features such as: bedside, real-time, continuous monitoring, radiation free and non-operator dependent.


Imaging classificationBedsideReal-timeContinuously monitoringRadiation freeNon-operator dependent
Infivision ET1000Functional
imaging
X-RayStructural
imaging
CTStructural
imaging
MRIStructural
imaging
UltrasoundFunctional imaging
&
Structural imaging
EIT Potential Applications
               
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