We consider the numerical solution, in two- and three-dimensional
bounded domains, of the inverse problem for identifying the location
of small-volume, conductivity imperfections in a medium with homogeneous
background. A dynamic approach, based on the wave equation, permits
us to treat the important case of “limited-view” data. Our numerical
algorithm is based on the coupling of a finite element solution of
the wave equation, an exact controllability method and finally a Fourier
inversion for localizing the centers of the imperfections. Numerical
results, in 2- and 3-D, show the robustness and accuracy of the approach
for retrieving randomly placed imperfections from both complete and
partial boundary measurements.