Uncertainty analysis and temperature sensitivity of the complex permittivity measurement of biological tissues using PMCT probes within a wide microwave frequency bands

The theoretical principle of RFM method is introduced firstly in this paper. The highlight in this work lies in the fact that the PMCT probes are employed for permittivity measurement of biological tissues. The RFM model for PMCT probe is developed based on 2 different reference liquids. The permittivity of two biological tissues (porcine fat and liver) are obtained from the measured reflection coefficients and thus calculated by the known RFM model. The uncertainties in the measurement such as the temperature and difference reference liquids have also been discussed. This work is believed to provide potential guidance for the simultaneous permittivity measurement with higher accuracy in case of medical treatment of human cancer.