Inversion of 10 GHz scattered field data from strong scatterers

In the inverse scattering problem, a quantitative image of an object can be determined from measurements of its scattered field. To solve this problem linearizing approximations such as the first-order Born and the Rytov approximations are frequently adopted because of the resulting ease with which a numerical procedure for inversion can be established. The authors have developed inversion algorithms using distorted-wave Born and Rytov approximations in order to extend the range of validity, while retaining the numerical advantages associated with the linearized methods. They have also used homomorphic filtering to separate the secondary source distribution into the scattering distribution and the total field components in the scatterers for different viewing directions.<>