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