Inside-out NMR with two concentric ring magnets.
J Magn Reson
; 333: 107082, 2021 12.
Article
en En
| MEDLINE
| ID: mdl-34688178
ABSTRACT
We report the design and the implementation of an inside-out NMR sensor that produces a large sensitive region with substantially uniform magnetic field at a remote location. The construction using a pair of ring magnets is simple yet provides multiple benefits, including large sample volume, operation with low RF power, and the ability to measure samples with long T2 and high diffusivity. A palm-size inside-out NMR sensor (57 mm OD × 29 mm height, 420 g including the housing and the coil PCB) was built with inexpensive magnets. The sweet spot is located â¼5 mm above the magnet surface with â¼4 mm width and â¼5 mm height assuming t180 = 18 µs. The field strength at that point is 0.16 T and achieved SNR â¼23 per two scans when operated with â¼10 W peak RF power. Its quasi-uniform B0 around the saddle point allows the measurement of T2 = 1.5 s with a 100 µs echo time.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
J Magn Reson
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
2021
Tipo del documento:
Article