Calibration Schemes for Probes for Breast Tissues Dielectric Properties Characterization

Currently, medical technology has great interest in the development of solutions based on using radiofrequency and electromagnetics techniques. This technology is non-invasive, low-cost and portable. How-ever, the main bottleneck is associated to the correct dielectric characterization of biological tissues. Their variability depending on either the applied pressure, temperature or position makes a difficult task to have a correct estimation of those electrical properties. A study of the effects of the pressure is presented in this paper. The method used was based on the open circuit coaxial probe under a pressure variation from 0 up to 69.71 kPa in a frequency range of 1-8 GHz is shown. The results showed a pressure range under which tissues do not suffer important alteration providing reliable results in the tissue electrical characterization.