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Table 1 Comparison of various time-difference algorithms

From: A novel time-difference electrical impedance tomography algorithm using multi-frequency information

tdEIT algorithms

Advantages

Disadvantages

BP

Fast imaging speed [6]

Easy implementation [7, 24]

Smearing artifacts [9]

Low spatial resolution [7, 9]

GN

Fast imaging speed [3]

Easy implementation [1, 4]

Generally performs better than BP [5]

Target boundary blurred [1]

TV

Sharp edges preserved [12]

Iteration needed [12]

Multiple parameters adjustment needed [12]

GREIT

Uniform amplitude response [5]

Training set required [5]

SC

Multi-frequency information integrated

Automatic extraction of single tissue

Image noise significantly reduced

Tissues conductivity spectra required