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

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  • Wenjun Wang, Technical University of Denmark, Denmark
  • Juan Diego Sánchez-Heredia, University of Copenhagen, Technical University of Denmark, Denmark
  • Rie Beck Olin, University of Copenhagen, Technical University of Denmark
  • ,
  • Esben Søvsø Szocska Hansen
  • Christoffer Laustsen
  • Vitaliy Zhurbenko, Technical University of Denmark
  • ,
  • Jan Henrik Ardenkjaer-Larsen, Technical University of Denmark

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.

Original languageEnglish
JournalMagnetic Resonance in Medicine
Pages (from-to)1265-1277
Number of pages13
Publication statusPublished - Mar 2023

    Research areas

  • MRI array, carbon imaging, cryogenic coil, head coil

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