Magnetic resonance signal moment determination using the Earth's magnetic field

E.O. Fridjonsson, S.A. Creber, J.S. Vrouwenvelder, M.L. Johns
Journal of Magnetic Resonance, volume 252, 145-150, (2015)

Magnetic resonance signal moment determination using the Earth

Keywords

k-space, Under-sampling, Signal moment analysis, Earths magnetic field

Abstract

​We demonstrate a method to manipulate magnetic resonance data such that the moments of the signal spatial distribution are readily accessible. Usually, magnetic resonance imaging relies on data acquired in so-called k-space which is subsequently Fourier transformed to render an image. Here, via analysis of the complex signal in the vicinity of the centre of k-space we are able to access the first three moments of the signal spatial distribution, ultimately in multiple directions. This is demonstrated for biofouling of a reverse osmosis (RO) membrane module, rendering unique information and an early warning of the onset of fouling. The analysis is particularly applicable for the use of mobile magnetic resonance spectrometers; here we demonstrate it using an Earth’s magnetic field system.

Code

DOI: 10.1016/j.jmr.2015.01.013

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