A cryogenic 14-channel 13 C receiver array for 3T human head imaging.

Autor: Wang W; National Space Institute, Technical University of Denmark, Kongens Lyngby, Denmark., Sánchez-Heredia JD; Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark., Olin RB; Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark., Hansen ESS; MR Research Center, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark., Laustsen C; MR Research Center, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark., Zhurbenko V; National Space Institute, Technical University of Denmark, Kongens Lyngby, Denmark., Ardenkjaer-Larsen JH; Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark.
Jazyk: angličtina
Zdroj: Magnetic resonance in medicine [Magn Reson Med] 2023 Mar; Vol. 89 (3), pp. 1265-1277. Date of Electronic Publication: 2022 Nov 02.
DOI: 10.1002/mrm.29508
Abstrakt: Purpose: This article presents a novel 14-channel receive-only array for 13 C human head imaging at 3 T that explores the SNR gain by operating at cryogenic temperature cooled by liquid nitrogen.
Methods: Cryostats are developed to evaluate single-coil bench SNR performance and cool the 14-channel array with liquid nitrogen while having enough thermal insulation between the coils and the sample. The temperature distribution for the coil array is measured. Circuits are adapted to the -189°C environment and implemented in the 14-channel array. 13 C images are acquired with the array at cryogenic and room temperature in a 3T scanner.
Results: Compared with room temperature, the array at cryogenic temperature provides 27%-168% SNR improvement over all voxels and 47% SNR improvement near the image center. The measurements show a decrease of the element noise correlation at cryogenic temperature.
Conclusion: It is demonstrated that higher SNR can be achieved by cryogenically cooling the 14-channel array. A cryogenic array suitable for clinical imaging can be further developed on the array proposed. The cryogenic coil array is most likely suited for scenarios in which high SNR deep in a head and decent SNR on the periphery are required.
(© 2022 The Authors. Magnetic Resonance in Medicine published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.)
Databáze: MEDLINE
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