Quasistatic Solutions versus Full-Wave Solutions of Single-Channel Circular RF Receive Coils on Phantoms of Varying Conductivities at 3 Tesla

Figure 2

Relative SNR (rSNR) images of quasistatic, full-wave, and measurement SNR data for the 6 cm coil elements. The bottom plots are the logarithmic transformation (dB) of the SNR images. Each image is cropped, so the full phantom is not shown. The dB plots easily show destructive wave effects in the full-wave and measurement images that are not present in the quasistatic images. All coils and phantoms showed these destructive wave effects in full-wave simulations and corresponding measurements. Images were acquired using a 2D axial GRE sequence positioned through the axis of each coil (TE/TR = 4.02/500 ms, flip angle = 90°, matrix size = 192 × 192, FOV = 200 × 200 mm, bandwidth = 260 Hz/pixel, and slice thickness = 5 cm).

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