Hongbae Jeong
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View article: High-quality multimodal MRI with simultaneous EEG using conductive ink and polymer-thick film nets
High-quality multimodal MRI with simultaneous EEG using conductive ink and polymer-thick film nets Open
Objective . Combining magnetic resonance imaging (MRI) and electroencephalography (EEG) provides a powerful tool for investigating brain function at varying spatial and temporal scales. Simultaneous acquisition of both modalities can provi…
View article: Meet Athena: A Realistic Computer Model of a Child
Meet Athena: A Realistic Computer Model of a Child Open
Have you ever wondered how doctors and scientists test new medical devices or study how the body works? They often use computer models, which are like digital dolls that simulate the human body. But did you know that there are only few com…
View article: RF-induced Heating Estimation of a Stent in a 3T MRI using Transfer Function Approach with a Tabletop E-field Generator
RF-induced Heating Estimation of a Stent in a 3T MRI using Transfer Function Approach with a Tabletop E-field Generator Open
The use of a transfer function (TF) method enables a conservative estimation for radio frequency (RF) safety assessment of active implantable devices (AIMDs). The TF approach can be applied to various scan conditions, patient populations, …
View article: A new method to improve RF safety of implantable medical devices using inductive coupling at 3.0 T MRI
A new method to improve RF safety of implantable medical devices using inductive coupling at 3.0 T MRI Open
Objective To enhance RF safety when implantable medical devices are located within the body coil but outside the imaging region by using a secondary resonator (SR) to reduce electric fields, the corresponding specific absorption rate (SAR)…
View article: Aluminum Thin Film Nanostructure Traces in Pediatric EEG Net for MRI and CT Artifact Reduction
Aluminum Thin Film Nanostructure Traces in Pediatric EEG Net for MRI and CT Artifact Reduction Open
Magnetic resonance imaging (MRI) and continuous electroencephalogram (EEG) monitoring are essential in the clinical management of neonatal seizures. EEG electrodes, however, can significantly degrade the image quality of both MRI and CT du…
View article: The MotoNet: A 3 Tesla MRI-Conditional EEG Net with Embedded Motion Sensors
The MotoNet: A 3 Tesla MRI-Conditional EEG Net with Embedded Motion Sensors Open
We introduce a new electroencephalogram (EEG) net, which will allow clinicians to monitor EEG while tracking head motion. Motion during MRI limits patient scans, especially of children with epilepsy. EEG is also severely affected by motion…
View article: Effect of subject‐specific head morphometry on specific absorption rate estimates in parallel‐transmit <scp>MRI</scp> at <scp>7 T</scp>
Effect of subject‐specific head morphometry on specific absorption rate estimates in parallel‐transmit <span>MRI</span> at <span>7 T</span> Open
Purpose To assess the accuracy of morphing an established reference electromagnetic head model to a subject‐specific morphometry for the estimation of specific absorption rate (SAR) in 7T parallel‐transmit (pTx) MRI. Methods Synthetic T 1 …
View article: A high-resolution pediatric female whole-body numerical model with comparison to a male model
A high-resolution pediatric female whole-body numerical model with comparison to a male model Open
Objective . Numerical models are central in designing and testing novel medical devices and in studying how different anatomical changes may affect physiology. Despite the numerous adult models available, there are only a few whole-body pe…
View article: Short-pulsed micro-magnetic stimulation of the vagus nerve
Short-pulsed micro-magnetic stimulation of the vagus nerve Open
Vagus nerve stimulation (VNS) is commonly used to treat drug-resistant epilepsy and depression. The therapeutic effect of VNS depends on stimulating the afferent vagal fibers. However, the vagus is a mixed nerve containing afferent and eff…
View article: Vagus Nerve Stimulation using micro-magnetic stimulation
Vagus Nerve Stimulation using micro-magnetic stimulation Open
View article: Planar figure-8 coils for ultra-focal and directional micromagnetic brain stimulation
Planar figure-8 coils for ultra-focal and directional micromagnetic brain stimulation Open
Recently, white-matter fiber tract pathways carrying neural signals through the brain were shown to follow curved, orthogonal grids. This study focuses on how these white-matter fibers may be selectively excited using micromagnetic stimula…
View article: Numerical Simulation of the Radiofrequency Safety of 128-Channel hd-EEG Nets on a 29-Month-Old Whole-Body Model in a 3 Tesla MRI
Numerical Simulation of the Radiofrequency Safety of 128-Channel hd-EEG Nets on a 29-Month-Old Whole-Body Model in a 3 Tesla MRI Open
This study investigates the radiofrequency (RF) induced heating in a pediatric whole-body voxel model with a high-density electroencephalogram (hd-EEG) net during magnetic resonance imaging (MRI) at 3 Tesla. A total of three cases were stu…
View article: Development, validation, and pilot MRI safety study of a high-resolution, open source, whole body pediatric numerical simulation model
Development, validation, and pilot MRI safety study of a high-resolution, open source, whole body pediatric numerical simulation model Open
Numerical body models of children are used for designing medical devices, including but not limited to optical imaging, ultrasound, CT, EEG/MEG, and MRI. These models are used in many clinical and neuroscience research applications, such a…
View article: Assessment of radio-frequency heating of a parallel transmit coil in a phantom using multi-echo proton resonance frequency shift thermometry
Assessment of radio-frequency heating of a parallel transmit coil in a phantom using multi-echo proton resonance frequency shift thermometry Open
We propose a workflow for validating parallel transmission (pTx) radio-frequency (RF) magnetic field heating patterns using Proton-Resonance Frequency shift (PRF)-based MR thermometry. Electromagnetic (EM) and thermal simulations of a 7 T …
View article: An investigation into the minimum number of tissue groups required for 7T in‐silico parallel transmit electromagnetic safety simulations in the human head
An investigation into the minimum number of tissue groups required for 7T in‐silico parallel transmit electromagnetic safety simulations in the human head Open
Purpose Safety limits for the permitted specific absorption rate (SAR) place restrictions on pulse sequence design, especially at ultrahigh fields (≥ 7 tesla). Due to intersubject variability, the SAR is usually conservatively estimated ba…
View article: An investigation into the minimum number of tissue groups required for\n 7T in-silico parallel transmit electromagnetic safety simulations in the\n human head
An investigation into the minimum number of tissue groups required for\n 7T in-silico parallel transmit electromagnetic safety simulations in the\n human head Open
Purpose: Safety limits for the permitted Specific Absorption Rate (SAR) place\nrestrictions on pulse sequence design, especially at ultra-high fields ($\\geq\n7$ tesla). Due to inter-subject variability, the SAR is usually conservatively\n…
View article: An investigation into the minimum number of tissue groups required for 7T in‐silico parallel transmit electromagnetic safety simulations in the human head
An investigation into the minimum number of tissue groups required for 7T in‐silico parallel transmit electromagnetic safety simulations in the human head Open
Purpose\nSafety limits for the permitted specific absorption rate (SAR) place restrictions on pulse sequence design, especially at ultrahigh fields (≥ 7 tesla). Due to intersubject variability, the SAR is usually conservat…
View article: Radiofrequency safety modelling of parallel transmit magnetic resonance imaging
Radiofrequency safety modelling of parallel transmit magnetic resonance imaging Open
Radio-frequency (RF) safety plays an important role in Magnetic Resonance Imaging (MRI) with the goal of assuring patient safety and preventing excessive RF heating. Historically, RF safety in MRI has been monitored using pre-calculated sp…