Study of PVC-based Skin Phantom with graphite particles in Terahertz Frequency Range T. Zhang, M.K. Khodzitsky, P.S. Demchenko, A.V. Bykov, A.P. Popov and I.V. Meglinski EPJ Web Conf., 195 (2018) 10019 Published online: 23 November 2018 DOI: 10.1051/epjconf/201819510019