EMR RF sensing UWB breast and head phantoms UWB diagnostics automated breast diagnosis biological tissues bioradar blood glucose levels brain stroke monitoring breast cancer breast cancer detection breast cancer diagnosis breast phantoms dielectric characterization dielectric measurements dielectric properties dielectric spectroscopy equipment-related confounders glucose-dependent dielectric properties image-guided machine learning medical imaging medical radar microwave microwave ablation microwave breast imaging microwave imaging microwave resonators microwave spectroscopy microwave tomography