A compact permanent magnet array with a remote homogeneous field

Marble, Andrew E.; Mastikhin, Igor V.; Colpitts, Bruce G.; Balcom, Bruce J.

doi:10.1016/j.jmr.2007.01.020

Cited by 86 publications

(61 citation statements)

References 13 publications

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“…While this facilitates high signal-to-noise, geometrically correct, spatially resolved magnetic resonance imaging (MRI), it limits the range of samples that can be examined. In recent years, this limitation has been addressed by development of portable or unilateral NMR [22][23][24]. The geometry of portable NMR sensors, in which the object is exposed to the stray field of the magnet, is referred to as open geometry.…”

Section: Portable Single-sided Nmr Sensors With Open Geometrymentioning

confidence: 99%

“…Sensors based on permanent magnets have been developed during the last years covering applications involving relaxometry, imaging and even spectroscopy with hand-held systems [20][21][22][23]. These devices require low maintenance costs and allow easy sample access, which makes them attractive for quality and process control in industrial environments.…”

Section: Introductionmentioning

confidence: 99%

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Portable NMR in food analysis

Capitani

Sobolev

Tullio

et al. 2017

Chem. Biol. Technol. Agric.

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Low-field 1 H NMR relaxometry is an important tool used to investigate on the most abundant components of intact foodstuffs based on relaxation parameters and amplitude of the NMR signals. In particular, information on water compartments, diffusion and movement can be obtained by detecting proton signals prevalently ascribable to H 2 O contained in foodstuffs. The main advantage of this technique is that it does not require any pretreatment of the sample and once developed, standard protocols based on rapid measurements can be easily transferred to quality control applications. An actual breakthrough for the low-field NMR application to food science has certainly been the development of unilateral NMR sensors. These devices present an attractive option for non-invasive assessment of compositional and microstructure of food materials. They are portable and allow easy sample access, which makes them attractive for quality control in industrial environments and directly on sealed packaged foods. A price to pay is the inhomogeneity of the magnetic field, which compromises the sensitivity of these devices. However, recent developments in unilateral magnets design offer larger sensitive volume, higher sensitivity and shorter dead times. In this brief review, we highlight the different uses of unilateral NMR devices in food analysis.

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Section: Portable Single-sided Nmr Sensors With Open Geometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Portable NMR in food analysis

Capitani

Sobolev

Tullio

et al. 2017

Chem. Biol. Technol. Agric.

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show abstract

“…A variation of the barrel magnet was developed by rotating the magnet blocks by 908. Instead of a full ring the magnet is consisted of blocks (19).…”

Section: Compact Magnets For Magnetic Resonance 53mentioning

confidence: 99%

Compact magnets for magnetic resonance

Demas

Prado

2009

Concepts Magnetic Resonance

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“…Because of this uniform fi eld spot, it should also perform well when measuring T 2 and the parameters derived from it, such as the diffusion constant. McDonald [10] and Marble [11] have presented different versions of such a unilateral magnet, while Callaghan ' s group has also developed a device that is closely related to ours [12] .…”

Section: Shrinking Nmrmentioning

confidence: 99%

Musings on Hardware Advances and New Directions

Fukushima

2008

Magnetic Resonance Microscopy

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A compact permanent magnet array with a remote homogeneous field

Cited by 86 publications

References 13 publications

Portable NMR in food analysis

Portable NMR in food analysis

Compact magnets for magnetic resonance

Musings on Hardware Advances and New Directions

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