IMPROVING THE RESOLUTION OF PULSED THERMAL-WAVE IMAGES WITH A SIMPLE INVERSE SCATTERING TECHNIQUE

We have developed an inverse scattering technique for removing the blu rring of pulse-echo thermal wave images. Preliminary results have been presented elsewhere [1-5]. We have extended the method to include the rmally anisotropic materials and also multiple scattering effects. The method provides an algorithm for inverting a single image, and obtain s the shape of the scatterer with a single calculation. The method inv olves no tomographic reconstruction and does not rely on a successive approximation scheme.