Yttrium-iron garnet magnetometer in MEG: Advance towards multi-channel arrays

Skidchenko, Ekaterina; Butorina, Anna; Ostras, Maxim; Vetoshko, P. M.; Kuzmichev, A. N.; Yavich, N.; Malovichko, Mikhail; Koshev, Nikolay

doi:10.1101/2022.07.11.499607

Cited by 2 publications

(2 citation statements)

References 43 publications

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“…Again, we plan to start our research on this with consideration of similar algorithms related to the neuroimaging area (see e.g. [21, 45, 47, 51]).…”

Section: Discussionmentioning

confidence: 99%

Yttrium-iron garnet film magnetometer for magnetic microparticles in vivo registration studies

Koshev

Kapralov

Evstigneeva

et al. 2022

Preprint

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In the current article, we present a new kind of magnetometer for quantitative determination of magnetic objects in biological fluids and tissues. The sensor is based on yttrium-iron garnet film with optical signal registration system. Inheriting the working principle of a fluxgate magnetometers, the sensor works at a room-temperature, its wide dynamic range allows the measurements in an unshielded environment. A small size of sensitive element combined with a short recovery time after the excitation coils are off provide us with a potentially high spatial and temporal resolution of measurements. We show the feasibility of the sensor by sensing the remanent magnetization of Magnetic Nanoparticles (MNPs) both in vitro (test tubes, dry MNPs) and in vivo (local injection of the MNPs into mice).

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“…Again, we plan to start our research on this with consideration of similar algorithms related to the neuroimaging area (see e.g. [21, 45, 47, 51]).…”

Section: Discussionmentioning

confidence: 99%

Yttrium-iron garnet film magnetometer for magnetic microparticles in vivo registration studies

Koshev

Kapralov

Evstigneeva

et al. 2022

Preprint

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“…OPMs also open new possibilities to research of deep brain structures, such as hippocampus and cerebellum [18] and proceed in investigation of the motor system when the subject is in motion [19,20]. Apart from empirical studies, OPMs are successfully used in simulations [2,21], and as a reference tool [22].…”

Section: Introductionmentioning

confidence: 99%

Lightweight and portable adaptive system for active suppression in magnetoencephalography: improved signal quality of QuSpin optically pumped sensors

Skidchenko,

Butorina,

Fedosov

et al. 2024

Preprint

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Nowadays, optically pumped magnetometers (OPMs) are gaining popularity in magnetoencephalography (MEG). However, like all sensors that work with biomagnetic signals, they are highly demanding to a low level of external magnetic field in the experimental environment. In the current paper, we proposed the experimental comparison of OPMs signal quality by recording their signal in two different magnetically-shielded rooms (MSRs) with different types of active suppression. Firstly, we conducted experiments in MSR in absence of additional local active shielding (only with one embedded into the walls). Next, we built the adaptive system of active suppression (ASAS), lightweight and portable, in another MSR and tested OPMs there. For this purpose we used sensors of two generations (Gen-1 and Gen-3) of commercial OPMs manufactured by QuSpin Inc. and tested them with standard signals generated by phantom and test coil. The results showed that MSR with installed ASAS in it enable OPMs to work optimally and give reliable results, while OPMs tested in the MSR containing SQUID system and active shielding embedded into the MSR walls, show unstable signal with low reproducibility. This study will undoubtedly facilitate research groups in building their own OP-MEG systems and understand the nature of false sensor deterioration.

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Yttrium-iron garnet magnetometer in MEG: Advance towards multi-channel arrays

Cited by 2 publications

References 43 publications

Yttrium-iron garnet film magnetometer for magnetic microparticles in vivo registration studies

Yttrium-iron garnet film magnetometer for magnetic microparticles in vivo registration studies

Lightweight and portable adaptive system for active suppression in magnetoencephalography: improved signal quality of QuSpin optically pumped sensors

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