Robust measurements of current-induced magnetic fields in the human brain by EPI

Frodi Gregersen; Cihan Göksu; Hasan H Eroğlu; Zhentao Zuo; Axel Thielscher; L.G. Hanson

Abstract

Magnetic resonance current density imaging (MRCDI) can measure the magnetic fields created in the human brain from currents injected via surface electrodes. Previous methods have demonstrated high sensitivity sucient for low current strengths (~1 mA). However, they have also proven susceptible to physiological noise. Here we increase the temporal resolution of the method and thereby the robustness to physiological noise by using echoplanar imaging (EPI) for the acquisition. We show that the method produces reliable magnetic field measurements with an average sensitivity of 52 pT for a 2 minutes scan with 3 mm isotropic resolution.

Originalsprog	Engelsk
Publikationsdato	2022
Antal sider	1
Status	Udgivet - 2022
Begivenhed	Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting - London, Englnd, UK Varighed: 7 maj 2022 → 12 maj 2022 https://www.ismrm.org/22m/

Konference

Konference	Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting
Lokation	London, Englnd, UK
Periode	07/05/2022 → 12/05/2022
Internetadresse	https://www.ismrm.org/22m/

Citationsformater

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TY - ABST

T1 - Robust measurements of current-induced magnetic fields in the human brain by EPI

AU - Gregersen, Frodi

AU - Göksu, Cihan

AU - Eroğlu, Hasan H

AU - Zuo, Zhentao

AU - Thielscher, Axel

AU - Hanson, L.G.

PY - 2022

Y1 - 2022

N2 - Magnetic resonance current density imaging (MRCDI) can measure the magnetic fields created in the human brain from currents injected via surface electrodes. Previous methods have demonstrated high sensitivity sucient for low current strengths (~1 mA). However, they have also proven susceptible to physiological noise. Here we increase the temporal resolution of the method and thereby the robustness to physiological noise by using echoplanar imaging (EPI) for the acquisition. We show that the method produces reliable magnetic field measurements with an average sensitivity of 52 pT for a 2 minutes scan with 3 mm isotropic resolution.

AB - Magnetic resonance current density imaging (MRCDI) can measure the magnetic fields created in the human brain from currents injected via surface electrodes. Previous methods have demonstrated high sensitivity sucient for low current strengths (~1 mA). However, they have also proven susceptible to physiological noise. Here we increase the temporal resolution of the method and thereby the robustness to physiological noise by using echoplanar imaging (EPI) for the acquisition. We show that the method produces reliable magnetic field measurements with an average sensitivity of 52 pT for a 2 minutes scan with 3 mm isotropic resolution.

M3 - Conference abstract for conference

SP - 1

EP - 1

T2 - Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting

Y2 - 7 May 2022 through 12 May 2022

ER -

Robust measurements of current-induced magnetic fields in the human brain by EPI

Abstract

Konference

Fingeraftryk

Citationsformater