Dielectric properties in fresh human trabecular bone tissue from 1MHz to 1000MHz.

IRASTORZA, RAMIRO M.; VALENTE, SERGIO; VERICAT, FERNANDO; BLANGINO, EUGENIA

Berlín, Alemania

Congreso; International Conference on Processing & Manufacturing of Advanced Materials, THERMEC 2009; 2009

The increasing research on development of novel bio-materials has resulted in several studies on non-destructive evaluation methods for characterising these materials and the biological materials receiving them. A broad range of techniques are available. As an alternative tool, electrical impedance spectroscopy, has become a widely used, non destructive and low cost technique in material quality evaluation. Particularly in bones, it has been also demonstrated that mechanical characteristics are strongly correlated to dielectric properties. In this work, non destructive estimation (the same samples can be tested using other techniques) of the dielectric properties of fresh trabecular bones (layered lossy structure) using coaxial probes is analysed from 1MHz to 10MHz (in frequency domain) and from 80MHz to 1GHz (in both, frequency and time domain). Frequency domain system identification is used to build the estimation in the low frequency range and an orthonormal based identification approach, for the high frequency data. Comments on conductive samples, non Debye dielectrics and polarization effects are added.