Novel materials in magnetic resonance imaging: high permittivity ceramics, metamaterials, metasurfaces and artificial dielectrics

A Webb, A Shchelokova, A Slobozhanyuk… - … Resonance Materials in …, 2022 - Springer
This article reviews recent developments in designing and testing new types of materials
which can be:(i) placed around the body for in vivo imaging,(ii) be integrated into a …

[HTML][HTML] Event-related functional magnetic resonance spectroscopy

RS Koolschijn, WT Clarke, IB Ip, UE Emir, HC Barron - Neuroimage, 2023 - Elsevier
Summary Proton-Magnetic Resonance Spectroscopy (MRS) is a non-invasive brain imaging
technique used to measure the concentration of different neurochemicals.“Single-voxel” …

Unmasking latent inhibitory connections in human cortex to reveal dormant cortical memories

HC Barron, TP Vogels, UE Emir, TR Makin, J O'shea… - Neuron, 2016 - cell.com
Balance of cortical excitation and inhibition (EI) is thought to be disrupted in several
neuropsychiatric conditions, yet it is not clear how it is maintained in the healthy human …

[HTML][HTML] The hippocampus and neocortical inhibitory engrams protect against memory interference

RS Koolschijn, UE Emir, AC Pantelides, H Nili… - Neuron, 2019 - cell.com
Our experiences often overlap with each other, yet we are able to selectively recall
individual memories to guide decisions and future actions. The neural mechanisms that …

Reducing RF-induced heating near implanted leads through high-dielectric capacitive bleeding of current (CBLOC)

L Golestanirad, LM Angelone, J Kirsch… - IEEE transactions on …, 2019 - ieeexplore.ieee.org
Patients with implanted medical devices such as deep brain stimulation or spinal cord
stimulation are often unable to receive magnetic resonance imaging (MRI). This is because …

Memory recall involves a transient break in excitatory-inhibitory balance

RS Koolschijn, A Shpektor, WT Clarke, IB Ip, D Dupret… - Elife, 2021 - elifesciences.org
The brain has a remarkable capacity to acquire and store memories that can later be
selectively recalled. These processes are supported by the hippocampus which is thought to …

High permittivity dielectric pads improve high spatial resolution magnetic resonance imaging of the inner ear at 7 T

WM Brink, AMA van der Jagt, MJ Versluis… - Investigative …, 2014 - journals.lww.com
Objectives The objective of this study was to evaluate the use of dielectric pads for improving
high spatial resolution imaging of the inner ear at 7 T. Materials and Methods Two sets of …

Gain‐enhancement technique for wearable patch antenna using grounded metamaterial

GK Das, S Basu, B Mandal, D Mitra… - IET Microwaves …, 2020 - Wiley Online Library
In this study, a metamaterial (MTM)‐based high‐gain compact‐wearable antenna for 2.45
GHz industrial, scientific and medical radio band application has been proposed. To achieve …

Improving homogeneity in abdominal imaging at 3 T with light, flexible, and compact metasurface

V Vorobyev, A Shchelokova, A Efimtcev… - Magnetic …, 2022 - Wiley Online Library
Purpose Radiofrequency field inhomogeneity is a significant issue in imaging large fields of
view in high‐and ultrahigh‐field MRI. Passive shimming with coupled coils or dielectric pads …

Volumetric wireless coil based on periodically coupled split‐loop resonators for clinical wrist imaging

AV Shchelokova, CAT van den Berg… - Magnetic resonance …, 2018 - Wiley Online Library
Purpose Design and characterization of a new inductively driven wireless coil (WLC) for
wrist imaging at 1.5 T with high homogeneity operating due to focusing the B1 field of a …