The technique of NMR is widely used for spectroscopic and
imaging purposes in both industrial and medical sectors.
Medical use includes imaging of humans for diagnostic
purposes. The technique involves the use of a relatively
high magnetic field, provided by superconducting magnets.
The objective of the proposed research project is to
reconsider the fundamental philosophy of MRI so as to
obtain good quality MRI using low-field magnets.
The aim is to consider the use of cryogenic and/or
superconductive sensors to improve the signal-to-noise
ratio and thus push the useful frequency range down to
low fields in which magnet design, construction and
operation are simpler. The best candidate for the censor
amplifier is the superconductive Quantum interference
device (SQUID). It has been routinely used for many years
in low temperature NM, but its use for room temperature
sources imposes some problems. The aim is to determine the
optimal use of SQUID/NMR in this field.
Keywords: low field NMR, SQUID/NMR, portable magnetic
resonance imaging/MRI unit.
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