A Travelling Wave Antenna with Matched Waveguide for Head Imaging at 7 T: Simulation Results

Keywords

achieve achieved allowing allows amount amplitude antenna arising arms around assessed astronomy back better biology blue bottom brain bring built capable cavity coils compatible complete conductor constrained contact contained coronal coupling coverage delivering delivery design dielectric dipole dipoles distance driven driving efficiencies efficiency eight either electrical ensuring entire example excites extending extends extracted family final frequency front function generated generating geometry glover gradient green head homogeneity impedance improve improved improvement in vivo incident indicates inefficient interfaces interfere involves just kingdom leads legs length local logarithmic long magnitude maps matched mismatches mode modes modest nature negligible optimum orthogonal peak perfect physics plus positioned positioning power predominantly propagate propagating propagation prototype radii radius receive reduced reduces reflections relatively respectively scale scanner selection sense setup shielded shim shoulders simulated simulation simulations spins standing stop stronger stub stubs supported surrounding surrounds table thin tissue torso touch towards transmit typical uniform varied virtual volume water wave waveguide waves