Reduction of Effect of Concomitant Gradients in Low Magnetic Field MRI via Optimization of Gradient Magnetic System

Chizhik, Vladimir I.; Frolov, Vyacheslav V.; Kupryanov, Pavel; Tyutyukin, Konstantin V.

doi:10.1007/s00723-017-0909-6

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…TSE-based approaches suffer less from geometric distortion than EPI-based approaches (multiple 180° refocusing pulses allow less phase accumulation than during the long single-shot EPI echo train [57] , [58] . However, this TSE-based approach on the MRL was plagued by signal-dropout artifacts [59] that may have been from eddy currents produced by linac gantry electrical components or concomitant gradients (extraneous magnetic gradients produced to satisfy the Ampere-Maxwell equation [60] ), but further investigation is necessary to confirm this.…”

Section: Discussionmentioning

confidence: 99%

Accurate, repeatable, and geometrically precise diffusion-weighted imaging on a 0.35 T magnetic resonance imaging-guided linear accelerator

Weygand,

Armstrong,

Bryant

et al. 2023

Physics and Imaging in Radiation Oncology

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Section: Discussionmentioning

confidence: 99%

Accurate, repeatable, and geometrically precise diffusion-weighted imaging on a 0.35 T magnetic resonance imaging-guided linear accelerator

Weygand,

Armstrong,

Bryant

et al. 2023

Physics and Imaging in Radiation Oncology

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“…For the compensation of local inhomogeneity in the rst approximation the simple pair of "rectangular Maxwell coils" with an axis directed along the vector of the Earth magnetic eld is used. The peculiarities of creating magnetic eld gradients in weak elds are considered in the work [15]. An example of a signal in ordinary laboratory conditions is demonstrated in Fig.…”

Section: Equipmentmentioning

confidence: 99%

To a question on possibilities of high-resolution NMR spectroscopy in the Earth magnetic field

Kupriyanov

Kirilenko²,

Chizhik

et al. 2021

Preprint

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The low signal-to-noise ratio is a characteristic feature of NMR experiments in the Earth magnetic field. The main problem of such studies is the ineffectiveness of signal accumulation due to fluctuations of the Earth magnetic field because of magnetic interferences from laboratory equipment and other magnetic field sources. Taking into account the fact that generally in the Earth magnetic field proton-containing liquids have spectra with a central strong line, a relatively simple method has been found to neutralize the Larmor frequency fluctuations. The NMR signal processing algorithm is described. The home-built NMR-equipment allows us to clearly register the splitting in proton spectra, for example, due to the J-interaction with such nuclei as 29Si or 13C at their natural abundance (4.7 and 1.1%, respectively).

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Reduction of Effect of Concomitant Gradients in Low Magnetic Field MRI via Optimization of Gradient Magnetic System

Cited by 2 publications

References 20 publications

Accurate, repeatable, and geometrically precise diffusion-weighted imaging on a 0.35 T magnetic resonance imaging-guided linear accelerator

Accurate, repeatable, and geometrically precise diffusion-weighted imaging on a 0.35 T magnetic resonance imaging-guided linear accelerator

To a question on possibilities of high-resolution NMR spectroscopy in the Earth magnetic field

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