The “Loopole” Antenna: A Hybrid Coil Combining Loop and Electric Dipole Properties for Ultra-High-Field MRI

Figure 7

Simulated central axial peak 10 g SAR maps with peak SAR values indicate that the loopole array produced the lowest SAR among the designs compared, 40% lower than the dipole array. The SAR hot spots for the loopole array and the dipole array are located close to their corresponding excitation ports (center of the high current arm for the loopole and at the center for the dipole). The SAR hot spot for the loop array was located close to the excitation port (at the service end).