A Multitasking Electrical Impedance Tomography System Using Titanium Alloy Electrode

Table 7

Recent EIT systems and comparison results.

EIT System Developer	Nottingham University	Dartmouth; College [33]	KAIST University [16]	Aachen University [27]	Maltron Sheffield MK 3.5	Mobecomm; MEIK	Carnegie Mellon University [34]
System
Dimension	140 mm diameter	600 mm	300 × 250 × 50 mm^3	N/A	N/A	160 × 180 × 100 mm^3	200 mm diameter
Image dimension	2D	3D	3D	2D	2D	2D	2D
Electrodes	16; (1 layer)	64; (4 layers)	92; (flexible)	16; (2 layers)	8; (1 layer)	256; (planar)	8, 16, 32; (1 layer)
Electrode materials	Copper, titanium alloy	N/A	N/A	N/A	N/A	N/A	Stainless steel
Frequency	1 Hz–1 MHz	10 kHz–10 MHz	100 Hz–100 kHz	60 kHz–1 MHz	2 kHz–1620 kHz	10 kHz, 50 kHz	40 kHz
Multifrequency	Yes	Yes	Yes	Yes	Yes	No	No
Amplitude	0.1–10 V,; 5 mA	N/A	10 A–400 A	N/A	N/A	0.5 mA	0–6 V,; 300 A
Multiamplitude	Yes	No	No	No	N/A	No	Yes
SNR	SINAD 8–70 dB; depends on channels and the injection frequency	94 dB	90 dB	109.6 dB	N/A	N/A	N/A
Minimum detectable size	1.5 mm; (in 140 mm)	N/A	5 mm; (in 120 mm)	N/A	N/A	3–5 mm	38.1 mm; (in 200 mm)
Measurement type	Single-ended	Differential	Differential	Differential	Differential	N/A	Differential
Processed signals	RMS, variance, standard deviations	N/A	N/A	N/A	N/A	N/A	RMS
Imaging device	Computer	Computer	Mobile device	Computer	Computer	Computer	Computer
Year	2016	2015	2015	2016	2014–2016	2010	2016