RIKEN: Developed high-resolution portable NMR: No need for liquid helium
-Advanced high-temperature superconducting bulk magnets-
RIKEN
JEOL RESONANCE
Imura Japan
The joint research group is working on the sophistication of high-temperature superconducting bulk magnets.
Magnetic field uniformity is even higher than MRI,
Maintains high resolution of 200 MHz (4.7 T),
We have succeeded in developing a new type of NMR.
Furthermore, the magnetized high-temperature superconducting bulk magnet was cooled in a refrigerator.
With a magnetic field generated
Even if NMR is transported or relocated
It was confirmed that the magnet performance did not change.
High resolution compact NMR:
“Portable use at the desk, which was not possible with conventional machines,” becomes possible.
also,
“No need for liquid helium”, avoiding the resource risk of helium.
main research:
It was announced at the “34th International Superconducting Symposium (ISS2021)” (held on November 30).
RIKEN
https://www.riken.jp/pr/news/2021/20211208_1/
Development of a superconducting bulk magnet for NMR and MRI
Abstract
A superconducting bulk magnet composed of six vertically stacked annular single-domain c-axis-oriented Eu-Ba-Cu-O crystals
was energized to 4.74 T using a conventional superconducting magnet for high-resolution NMR spectroscopy.
Shim coils, gradient coils, and radio frequency coils for high resolution NMR and MRI
were installed in the 23 mm-diameter room-temperature bore of the bulk magnet.
A 6.9 ppm peak-to-peak homogeneous region suitable for MRI
was achieved in the central cylindrical region (6.2 mm diameter, 9.1 mm length) of the bulk magnet by using a single layer shim coil.
A 21 Hz spectral resolution
that can be used for high resolution NMR spectroscopywas obtained in the central cylindrical region (1.3 mm diameter, 4 mm length) of the bulk magnet by using a multichannel shim coil.
A clear 3D MR image dataset of a chemically fixed mouse fetus with (50 μm)(3) voxel resolution was obtained in 5.5 h.
We therefore
concluded that the cryogen-free superconducting bulk magnet developed in this study is useful for high-resolution desktop NMR, MRI and mobile NMR device.– PubMed