The theory of inverse boundary value problems has been used in fields of engineering and physics such as non-destructive testing, medical imaging. <br />
Calder\&#039;{o}n&#039;s inverse problem for an elliptic partial differential equation appears in electrical impedance tomography (EIT).<br />
EIT is one of techniques for medical imaging.<br />
One can infer inside of human body by the surface electrode measurements. <br />
Mathematically, this technique corresponds to the reconstruction of the electrical conductivity from boundary measurements.<br />
One of theoretical models of boundary measurements is the Dirichlet-to-Neumann map.<br />
In the present paper, we consider a discrete analogue of Calder\&#039;{o}n&#039;s inverse problem.<br />
Namely, we derive a reconstruction procedure of conductivity on circular resistor networks from the Dirichlet-to-Neumann map.<br />
A numerical example of perturbation of the Dirichlet-to-Neumann map is also given in this paper.