Next-generation MRI scanner designed for ultra-high-resolution human brain imaging at 7 Tesla

DA Feinberg, AJS Beckett, AT Vu, J Stockmann… - Nature …, 2023 - nature.com
To increase granularity in human neuroimaging science, we designed and built a next-
generation 7 Tesla magnetic resonance imaging scanner to reach ultra-high resolution by …

Ultra-high field MRI: parallel-transmit arrays and RF pulse design

SN Williams, P McElhinney… - Physics in Medicine & …, 2023 - iopscience.iop.org
This paper reviews the field of multiple or parallel radiofrequency (RF) transmission for
magnetic resonance imaging (MRI). Currently the use of ultra-high field (UHF) MRI at 7 tesla …

A review of parallel transmit arrays for ultra-high field MR imaging

CH Choi, A Webb, S Orzada… - IEEE Reviews in …, 2023 - ieeexplore.ieee.org
Parallel transmission (pTX) techniques are required to tackle a number of challenges, eg,
the inhomogeneous distribution of the transmit field and elevated specific absorption rate …

Deep learning‐based local SAR prediction using B1 maps and structural MRI of the head for parallel transmission at 7 T

S Gokyar, C Zhao, SJ Ma… - Magnetic Resonance in …, 2023 - Wiley Online Library
Purpose To predict subject‐specific local specific absorption rate (SAR) distributions of the
human head for parallel transmission (pTx) systems at 7 T. Theory and methods …

Improved 1H body imaging at 10.5 T: Validation and VOP‐enabled imaging in vivo with a 16‐channel transceiver dipole array

S Schmidt, MA Ertürk, X He, T Haluptzok… - Magnetic resonance …, 2024 - Wiley Online Library
Purpose To increase the RF coil performance and RF management for body imaging at 10.5
T by validating and evaluating a high‐density 16‐channel transceiver array, implementing …

Tier‐based formalism for safety assessment of custom‐built radio‐frequency transmit coils

BR Steensma, A Sadeghi‐Tarakameh… - NMR in …, 2023 - Wiley Online Library
The purpose of this work is to propose a tier‐based formalism for safety assessment of
custom‐built radio‐frequency (RF) coils that balances validation effort with the effort put in …

Radiofrequency safety of high permittivity pads in MRI—Impact of insulation material

WM Brink, RF Remis, AG Webb - Magnetic resonance in …, 2023 - Wiley Online Library
Purpose High permittivity dielectric pads are known to be effective for tailoring the RF field
and improving image quality in high field MRI. Despite a number of studies reporting benign …

Triple‐tuned birdcage and single‐tuned dipole array for quadri‐nuclear head MRI at 7 T

J Paška, B Wang, AM Chen, G Madelin… - Magnetic Resonance …, 2024 - Wiley Online Library
Purpose The purpose of this work was to design and build a coil for quadri‐nuclear MRI of
the human brain at 7 T. Methods We built a transmit/receive triple‐tuned (45.6 MHz for 2^ 2 …

The restricted SAR protocol: A method to assess MRI coil prototypes in an unconditionally safe manner

N Dudysheva, F Mauconduit… - Magnetic …, 2024 - Wiley Online Library
Purpose Testing an RF coil prototype on subjects involves laborious verifications to ensure
its safety. In particular, it requires preliminary electromagnetic simulations and their …

Local and whole‐body SAR in UHF body imaging: Implications for SAR matrix compression

TM Fiedler, ME Ladd, S Orzada - Magnetic resonance in …, 2025 - Wiley Online Library
Purpose Transmit arrays for body imaging have characteristics of both volume and local
transmit coils. This study evaluates two specific absorption rate (SAR) aspects, local and …