Explanipedia

MR imaging of the magnetic fields induced by injected currents can guide improvements of individualized head volume conductor models Open

Fróði Gregersen, Hasan Eroglu, Cihan Göksu, Oula Puonti, Zhentao Zuo , et al. · 2024

Volume conductor models of the human head are routinely used to estimate the induced electric fields in transcranial brain stimulation (TBS) and for source localization in electro- and magnetoencephalography (EEG and MEG). Magnetic resonan…

Volumetric measurements of weak current–induced magnetic fields in the human brain at high resolution Open

Cihan Göksu, Fróði Gregersen, Klaus Scheffler, Hasan Eroglu, Rahel Heule , et al. · 2023

Purpose Clinical use of transcranial electrical stimulation (TES) requires accurate knowledge of the injected current distribution in the brain. MR current density imaging (MRCDI) uses measurements of the TES‐induced magnetic fields to pro…

Estimation of conductivities in a personalized volume conductor model of the human head using MRCDI Open

Fróði Gregersen, Hasan Eroglu, Oula Puonti, Cihan Göksu, Hartwig R. Siebner , et al. · 2022

Human in-vivo magnetic resonance current density imaging of the brain by optimizing head tissue conductivities Open

Hasan Eroglu, Oula Puonti, Cihan Göksu, Fróði Gregersen, Hartwig R. Siebner , et al. · 2021

Introduction: Magnetic resonance current density imaging (MRCDI) aims to reconstruct the current flow of transcranial electrical stimulation (TES) in the brain from MR-measurements of the current-induced magnetic field Bz. Aim: We test the…

On the reconstruction of magnetic resonance current density images of the human brain: Pitfalls and perspectives Open

Hasan Eroglu, Oula Puonti, Cihan Göksu, Fróði Gregersen, Hartwig R. Siebner , et al. · 2021

Magnetic resonance current density imaging (MRCDI) of the human brain aims to reconstruct the current density distribution caused by transcranial electric stimulation from MR-based measurements of the current-induced magnetic fields. So fa…

Sensitivity and resolution improvement for in vivo magnetic resonance current‐density imaging of the human brain Open

Cihan Göksu, Klaus Scheffler, Fróði Gregersen, Hasan Eroglu, Rahel Heule , et al. · 2021

Purpose Magnetic resonance current‐density imaging (MRCDI) combines MRI with low‐intensity transcranial electrical stimulation (TES; 1‐2 mA) to map current flow in the brain. However, usage of MRCDI is still hampered by low measurement sen…

On the Reconstruction of Magnetic Resonance Current Density Images of the Human Brain: Pitfalls and Perspectives Open

Hasan Eroglu, Oula Puonti, Cihan Göksu, Fróði Gregersen, Hartwig R. Siebner , et al. · 2021

Magnetic resonance current density imaging (MRCDI) of the human brain aims to reconstruct the current density distribution caused by transcranial electric stimulation from MR-based measurements of the current-induced magnetic fields. The r…

Sensitivity and resolution improvement for in-vivo magnetic resonance current density imaging (MRCDI) of the human brain Open

Cihan Göksu, Klaus Scheffler, Fróði Gregersen, Hasan Eroglu, Rahel Heule , et al. · 2021

Purpose Magnetic resonance current density imaging (MRCDI) combines MR brain imaging with the injection of time-varying weak currents (1-2 mA) to assess the current flow pattern in the brain. However, the utility of MRCDI is still hampered…

Safety evaluation of a new setup for transcranial electric stimulation during magnetic resonance imaging Open

Fróði Gregersen, Cihan Göksu, Gregor Schaefers, Rong Xue, Axel Thielscher , et al. · 2021

Probing EEG activity in the targeted cortex after focal transcranial electrical stimulation Open

Syoichi Tashiro, Hartwig R. Siebner, Angeliki Charalampaki, Cihan Göksu, Guilherme B. Saturnino , et al. · 2020

The hybrid TES-EEG approach can be used to probe after-effects of focal TES on neuronal activity in the targeted cortex.

Correction of stray magnetic fields caused by cable currents is essential for human in-vivo brain magnetic resonance current density imaging (MRCDI) Open

Cihan Göksu, Klaus Scheffler, Hartwig R. Siebner, Lars G. Hanson, Axel Thielscher · 2019

Accurate mapping of current flows in the human brain is important for many neuroscientific applications. MRCDI is an emerging method, which combines MRI with externally applied alternating currents to derive current flow distributions base…

[OA019] Human in-vivo Magnetic Resonance Current Density Imaging (MRCDI) and MR Electrical Impedance Tomography (MREIT) Open

Cihan Göksu, Lars G. Hanson, Hartwig R. Siebner, Philipp Ehses, Klaus Scheffler , et al. · 2018

Comparison of two alternative sequences for human in-vivo brain MR Current Density Imaging (MRCDI) Open

Cihan Göksu, Lars G. Hanson, Hartwig R. Siebner, Philipp Ehses, Klaus Scheffler , et al. · 2018

MRCDI is a novel technique, utilizing different phase-sensitive MR methods for non-invasive measurements of weak currents in the human body, which is important in several neuroscience applications. Here, we compare the in-vivo performance …

Human In-vivo Brain MR Current Density Imaging (MRCDI) based on Steady-state Free Precession Free Induction Decay (SSFP-FID) Open

Cihan Göksu, Lars G. Hanson, H Siebner, Philipp Ehses, Klaus Scheffler , et al. · 2018

MRCDI is a novel technique for non-invasive measurement of weak currents in the human head, which is important in several neuroscience applications. Here, we present reliable in-vivo MRCDI measurements in the human brain based on SSFP-FID,…

Efficiency analysis of magnetic field measurement for MR electrical impedance tomography (MREIT) Open

Cihan Göksu, Lars G. Hanson, P Ehses, Klaus Scheffler, Axel Thielscher · 2016

Purpose/Introduction: MREIT is an emerging method to measure the ohmic tissue conductivities, with several potential biomedical applications. Its sensitivity depends on the magnitude of the applied current, which is limited to 1–2 mA in th…

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