Identification of an inclusion in multifrequency electric impedance tomography

Habib Ammari (1) , Faouzi Triki (2)

1 ETH-SAM - Seminar for Applied Mathematics
2 EDP - Equations aux Dérivées Partielles

The multifrequency electrical impedance tomography is considered in order to image a conductivity inclusion inside a homogeneous background medium by injecting one current. An original spectral decomposition of the solution of the forward conductivity problem is used to retrieve the Cauchy data corresponding to the extreme case of perfect conductor. Using results based on the unique continuation we then prove the uniqueness of multifrequency electrical impedance tomography and obtain rigorous stability estimates. Our results in this paper are quite surprising in inverse conductivity problem since in general infinitely many input currents are needed in order to obtain the uniqueness in the determination of the conductivity.

Mots clés: stability estimates; Inverse problems; electric impedance tomography

Domaines: Equations aux dérivées partielles [math.AP]

Habib Ammari, Faouzi Triki. Identification of an inclusion in multifrequency electric impedance tomography. Communications in Partial Differential Equations, 2017, 42 (1), pp.159-177. ⟨10.1080/03605302.2016.1258578⟩. ⟨hal-01369583⟩