Generalized time-reversal imaging considering multiple scattering effects

This paper considers time-reversal (TR) imaging with the multiple signal classification (MUSIC) method for the location of point targets, not only in the usual framework of the Born approximation but also in more general nonlinear scattering frameworks where there is multiple scattering between the targets. This finding is important toward practical implementations of the TR technique facing multiple scattering effects. The super-resolution results of a previous paper (C. Prada et al., Acoust. Soc. Am., vol.114, p.235-243, 2003) can now be better characterized theoretically in the multiple scattering regime. We showed how both the conventional, backpropagated images of the principal eigenvectors and the predicted values of the target scattering amplitudes are scattering model-dependent.