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                <term xml:lang="en">Conducting materials</term>
                <term xml:lang="en">Conductivity</term>
                <term xml:lang="en">Eddy current testing</term>
                <term xml:lang="en">Integral equations</term>
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                <term xml:lang="en">Tomography</term>
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              <p>This analysis of eddy current testing of defects in conductive materials is divided in two parts. Part I [l]was devoted to reflection-mode diffraction tomography imaging tech- niques. Part I1 discusses application of deterministic and sto- chastic quantitative inversion techniques to similar configurations, and heavily draws upon Part I for physics and calculations of the eddy currents. The defects are modeled as cy- lindrical inhomogeneities concealed within a homogeneous non- magnetic metallic half-space. Values of the conductivity within the anomaly cross section have to be retrieved from multifrequency anomalous fields observed on a line above and parallel with the surface on the damaged block when a known time-harmonic source illuminates the block. Such quantitative imaging involves the ill-posed inversion of a Fredholm first-kind integral equation with exponentially damped kernel and requires some kind of regularization. Two approaches are fo- cused upon. In a deterministic context, an iterative algorithm provides a regularized generalized inverse, with the inconvenient that the stopping parameter should be appropriately chosen. In a stochastic context, Kalman filtering rapidly yields a good estimate of the conductivities, which could be the start- up of a more precise but costlier solution.</p>
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