Figure 6.

Generation of modal patterns of a quadrature resonant coil such as a TEM coil using the transmit array with a non-resonant structure. The figure is a [3×4] matrix with rows labeled (A-C) and columns labeled (a-d). The simulated modal patterns of an 8-rung TEM coil are [(A), (a-d)] are obtained by exciting the modes at their characteristic frequencies of 130.38 MHz (a), 131.94 MHz (b), 132.9 MHz (c) and 133.23 MHz (d). These modal patterns are generated at a single frequency (127.74 MHz) by the non-resonant transmit phased array [(B), (a-d)] by setting the current phase distributions on the current elements as shown in the charts of [(C), (a-d)]. Current amplitudes are held constant for all four modes. TEM, transverse electromagnetic.