Detection of Small Changes in a Hip Prosthesis using the E-Pulse Technique

A subsurface target identification scheme based on the E-pulse technique is proposed and investigated. The target inside a homogenous medium is approximated using Baum´s transform. An E-pulse is constructed with the transformed complex natural resonances (CNRs) and convolved with the target returns from subsurface targets. Numerical examples of a hip prosthesis implanted within a homogenous half space shows that the proposed technique is capable of differentiating small physical changes between two hip prosthesis models at least under a homogeneous half-space condition. The proposed method can also be applied to other subsurface target detection problems such as UXO recognition, and for a dielectric target, the problem of recognition of malignant lumps within human breast tissue