Noninvasive bulk dielectric testing

The complex dielectric properties can be quite unique for different substances. Non-invasive microwave imaging which recovers the associated properties of commercial products could prove useful in numerous settings such as assessing the integrity of solids and testing for spoilage of food stuffs. We have adapted our microwave breast imaging system for testing arbitrarily shaped targets with varying properties. This exploits a new soft prior regularization strategy which only requires spatial geometry information along with the measured field data to reconstruct accurate property measurements of the target under test (TUT). Refining the target interface and optimizing the reconstruction code for this specific application could facilitate near real-time assessment for a range of targets.