Investigation of error propagation and measurement error for 2D block method in Electrical Impedance Tomography

Abstract

2D block method (2D BM) is a new approach to solve inverse problem as one of the most challenging case in Electrical Impedance Tomography (EIT). In this method, a tissue is modeled by some blocks to construct a medical image of a body limb. Recently, a non-iterative linear inverse solution is introduced to solve the inverse problem in the 2D BM. But effect of measurement error has not been considered for non-iterative linear inverse solution yet. In this paper, an appropriate method is proposed to investigate the error propagation in 2D BM. The effect of measurement error is considered as well through different examples. Results show that the BM is very sensitive to the measurement error and fault propagation depends mainly on the type of tissue conductivity distribution. It also can be show that the error increases exponentially in each calculation step. Keywords: Electrical Impedance Tomography (EIT), error propagation, measurement error, 2D block method978-1-4799-8445-9/15/$31.00 ©2015 IEEE