Reconstruction of electrical impedance tomography (EIT) images based on the expectation maximum (EM) method

► The expectation maximization method is used to solve the inverse problem for EIT. ► The mathematical model of EIT is transformed to likelihood minimization problem. ► The noise level of the measurement system is considered as prior information. ► The EM method can obtain a non-negative solution and low image distortion. ► The EM method is robust to measurement noise.