Numerical Evaluation of B1-field and SAR for Heterogeneous and Homogeneous Body Model

|ave) in the central transverse and sagittal slices of the heterogeneous and homogeneous body models, respectively. The |B1 + |ave is the average |B1 + |-field over the central transverse slice as shown in Fig. 1(b) excluding the arms. Referring to Fig. 2(a) and (b), it is seen that for the particular body position modeled, the B1 + -field in the heterogeneous body model and homogeneous body model globally have similar field patterns. The same is true for B1 + -field in the central sagittal slice (see Fig. 2(c) and (d)) and the central coronal slice (not shown). The initially uniform B1 + -field in the unloaded QBC is altered by the combined effects of tissue dielectric and eddy current. High dielectric constant tends to enhance the B1 + -field in the center, while