9.4 T Double-Tuned 13C/1H Human Head Array Using a Combination of Surface Loops and Dipole Antennas.
Nikolai Avdievich1, Georgiy Solomakha2, Loreen Ruhm1, Anke Henning1,3, and Klaus Scheffler1
1High-field Magnetic Resonance, Max Planck Institute for Bilogical Cybernetics, Tübingen, Germany, 2Physics and Engineering, ITMO University, St. Petersburg, Russian Federation, 3Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX, United States
Combining X-nuclei surface loops and 1H dipoles can substantially simplify the design of a double-tuned UHF human head coil. We developed and constructed a novel 13C/1H human head 9.4T array coil consisting of eight 13C surface loops and eight 1H folded-end dipoles surrounding the head.
Figure 1. A) EM simulation model of the double-tuned 13C/ 1H array coil loaded by the HS phantom. B) Photo of the 13C/ 1H array with the RF shield removed for better visualization. C) EM simulation model of the 13C/ 1H array loaded by the Duke voxel model. In Figure 1B, dipoles and loops are marked by red and yellow dashed lines, respectively.
Figure 5. Central sagittal in-vivo human brain GRE images (A, B, C) and corresponding B1+ maps (D, E, F) obtained using the presented double-tuned 13C/ 1H array (A,D), double-tuned 20-loop 31P/ 1H array (B, E), and single-tuned 16-loop double-row 1H array (C, F).