3D-Spatial encoding with permanent magnets for ultra-low field magnetic resonance imaging

We describe with a theoretical and numerical analysis the use of small permanent magnets moving along prescribed helical paths for 3D spatial encoding and imaging without sample adjustment in ultra-low field magnetic resonance imaging (ULF-MRI). With our developed method the optimal magnet path and...

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Bibliographic Details
Published inScientific reports Vol. 9; no. 1; p. 1522
Main Authors Vogel, Michael W, Guridi, Ruben Pellicer, Su, Jiasheng, Vegh, Viktor, Reutens, David C
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 06.02.2019
Nature Publishing Group UK
Subjects
Magnetic resonance imaging
Magnetism
NMR
Nuclear magnetic resonance
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Summary:We describe with a theoretical and numerical analysis the use of small permanent magnets moving along prescribed helical paths for 3D spatial encoding and imaging without sample adjustment in ultra-low field magnetic resonance imaging (ULF-MRI). With our developed method the optimal magnet path and orientation for a given encoding magnet number and instrument architecture can be determined. As a proof-of-concept, we studied simple helical magnet paths and lengths for one and two encoding magnets to evaluate the imaging efficiency for a mechanically operated ULF-MRI instrument with permanent magnets. We demonstrate that a single encoding magnet moving around the sample in a single revolution suffices for the generation of a 3D image by back projection.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-37953-1