Direct Calculation of Tissue Electrical Parameters from B1 Maps

Selaka B. Bulumulla¹, Teck Beng Yeo¹, Yudong Zhu¹

There is interest in in-vivo measurement of tissue electrical parameters (conductivity and permittivity) for diagnostic purposes as malignant cells are known to have different electrical properties from surrounding healthy tissue. Tissue conductivity is also required to estimate local heating effects in multi-channel transmit schemes. In this paper, we derive a set of equations to directly calculate tissue electrical properties from B1+ maps. The equations are verified by estimating the conductivity and relative permittivity of a human body model, using B1+ maps obtained from electromagnetic simulations.