Juan Diego Sánchez Heredia1, Wenjun Wang1,2, James T. Grist3,4,5, Esben Søvsø Szocska Hansen6, Christoffer Laustsen6, Vitaliy Zhurbenko2, and Jan Henrik Ardenkjær-Larsen1
1Department of Health Technology, Technical University of Denmark (DTU), Kgs. Lyngby, Denmark, 2Department of Electrical Engineering, Technical University of Denmark (DTU), Kgs. Lyngby, Denmark, 3Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom, 4Oxford Centre for Magnetic Resonance, University of Oxford, Oxford, United Kingdom, 5Department of Radiology, The Churchill Hospital, Oxford University Hospitals NHS Trust, Oxford, United Kingdom, 6The MR Research Center, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
1Department of Health Technology, Technical University of Denmark (DTU), Kgs. Lyngby, Denmark, 2Department of Electrical Engineering, Technical University of Denmark (DTU), Kgs. Lyngby, Denmark, 3Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, United Kingdom, 4Oxford Centre for Magnetic Resonance, University of Oxford, Oxford, United Kingdom, 5Department of Radiology, The Churchill Hospital, Oxford University Hospitals NHS Trust, Oxford, United Kingdom, 6The MR Research Center, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
An 8-Channel flexible array is proposed for hyperpolarized 13C, where the coil coupling coefficients are matched to be
nearly identical at the 13C (32.1 MHz) and 23Na (33.8 MHz) frequencies. This
way, the 23Na present in biological tissue can be used to obtain accurate 13C
profiles.
Figure 4. (a) Measured sensitivity profiles of the
individual array channels for 13C (top) and 23Na (bottom). (b) 13C Noise correlation matrix. (c) 23Na Noise correlation matrix.
Figure 1. Fabricated flexible 8-channel 13C
receive array (f = 32.1 MHz): a) with the 8-elements visible sewn into a flexible cloth, b) covered
with a flame-retardant protective cloth and, c) wrapped over the head-size
phantom used for imaging. All the electronic components (matching network,
active decoupling, LNA) are integrated into one PCB, and enclosed into an ABS
box (60x35x15 [mm]).
