Spinal cord MRI at 7T
Magnetic resonance imaging (MRI) of the human spinal cord at 7T has been demonstrated
by a handful of research sites worldwide, and the spinal cord remains one of the areas in …
by a handful of research sites worldwide, and the spinal cord remains one of the areas in …
Parallel transmission for ultrahigh field MRI
CM Deniz - Topics in Magnetic Resonance Imaging, 2019 - journals.lww.com
Magnetic resonance imaging (MRI) has been driven toward ultrahigh magnetic fields (UHF)
in order to benefit from correspondingly higher signal-to-noise ratio and spectral resolution …
in order to benefit from correspondingly higher signal-to-noise ratio and spectral resolution …
Ratio‐adjustable power splitters for array‐compressed parallel transmission
Purpose To implement and validate low‐loss ratio‐adjustable power splitters (RAPS) for
array‐compressed parallel transmission (acpTx). Methods In acpTx, a small number of …
array‐compressed parallel transmission (acpTx). Methods In acpTx, a small number of …
New resonator geometries for ICE decoupling of loop arrays
RF arrays with a large number of independent coil elements are advantageous for parallel
transmission (pTx) and reception at high fields. One of the main challenges in designing RF …
transmission (pTx) and reception at high fields. One of the main challenges in designing RF …
Comparison of tight‐fitting 7T parallel‐transmit head array designs using excitation uniformity and local specific absorption rate metrics
E Kazemivalipour, LL Wald… - Magnetic Resonance in …, 2024 - Wiley Online Library
Purpose We model the performance of parallel transmission (pTx) arrays with 8, 16, 24, and
32 channels and varying loop sizes built on a close‐fitting helmet for brain imaging at 7 T …
32 channels and varying loop sizes built on a close‐fitting helmet for brain imaging at 7 T …
Resistor-free and one-board-fits-all ratio adjustable power splitter for add-on RF shimming in high field MRI
Ratio adjustable power splitter (RAPS) circuits were recently proposed for add-on RF
shimming. Previous RAPSs split the input RF signal with a Wilkinson splitter or 50-Ω …
shimming. Previous RAPSs split the input RF signal with a Wilkinson splitter or 50-Ω …
Designing parallel transmit head coil arrays based on radiofrequency pulse performance
Purpose A new approach to design parallel transmit (pTx) head arrays is proposed that
integrates transmit radiofrequency pulse designs with electromagnetic modeling of array coil …
integrates transmit radiofrequency pulse designs with electromagnetic modeling of array coil …
Hybrid‐pair ratio adjustable power splitters for add‐on RF shimming and array‐compressed parallel transmission
Purpose A ratio adjustable power splitter (RAPS) circuit was recently proposed for add‐on
RF shimming and array‐compressed parallel transmission. Here we propose a new RAPS …
RF shimming and array‐compressed parallel transmission. Here we propose a new RAPS …
A retrofit to enable dynamic steering for transmit arrays without multiple amplifiers
Purpose shimming is an important method for mitigating B1 inhomogeneity in high‐field
MRI. Using independent power amplifiers for each transmit (Tx) element is the preferred …
MRI. Using independent power amplifiers for each transmit (Tx) element is the preferred …
On the design and manufacturing of miniaturized microstripline power splitters for driving multicoil transmit arrays with arbitrary ratios at 7 T
CR Sappo, GL Gallego, WA Grissom… - NMR in …, 2022 - Wiley Online Library
The purpose of the current study was to implement unequal microstrip power splitters for
parallel transmission at 7 T that are optimized for size and loss and that can be configured …
parallel transmission at 7 T that are optimized for size and loss and that can be configured …