Chirp-Pulse Microwave Computerized Tomography: An Analysis Based on an FD-TD Method and on Scattering Theory

Michele Piana
Universita di Genova

Joint with M Bertero, F Conte, G Marrocco and A M Massone

Chirp-Pulse Microwave Computerized Tomography (CP-MCT) is a tomographic technique providing temperature maps of the body under investigation. Its main features are: the geometry is essentially the one of X-ray tomography in its parallel beam setup; the input signal is a chirp wave with increasing frequency from 1 GHz to 2 GHz; the chirp input signal is mixed with the output field and the resulting signal is appropriately filtered.
We use an FD-TD technique to compute the projection of simple objects and the response function of the device. This impulse response is compared with the one computed by means of the scattering equation. Finally a linear model for data reduction is introduced and validated.
Such model inspires a two-step image restoration algorithm based on the non-linear projection onto closed convex subsets of the solution space.


Back to Applied Inverse Problems: Theoretical and Computational Aspects