Publications by authors named "S B Jungst"
Purpose: To develop and characterize the performance of a 128-channel head array for brain imaging at 10.5 tesla and evaluate the potential of brain imaging at this unique, >10 tesla magnetic field.
Methods: The coil is composed of a 16-channel self-decoupled loop transmit/receive array with a 112-loop receive-only (Rx) insert.
Article Synopsis
- The study aims to enhance ultrahigh-field brain imaging by evaluating the achievable signal-to-noise ratio (SNR) against the ultimate intrinsic SNR (uiSNR) at 10.5T, and exploring designs to improve SNR for better imaging results.
- A specialized 16-channel Tx/Rx array and a 64-channel receive-only array were created for use with the 10.5T MRI, with experiments confirming safe operational limits and comparisons of SNR at 10.5T and 7T.
- Results indicated that the technology can capture significant portions of uiSNR at 10.5T for high-resolution imaging, demonstrating its effectiveness for functional MRI, setting the stage for future advanced studies of the human
Article Synopsis
- The study aims to enhance brain imaging at 10.5 Tesla (T) by developing multichannel transmit and receive arrays to achieve the best possible signal-to-noise ratio (uiSNR).
- A new 16-channel transmit/receive array was created, alongside a 64-channel receive-only array, and underwent testing to ensure safety for human use, ultimately receiving FDA approval.
- Results showed that the new configuration significantly improved imaging quality, matching the effectiveness of lower-field setups while demonstrating high-resolution brain imaging capabilities for the first time at this field strength.
A 32-Channel Sleeve Antenna Receiver Array for Human Head MRI Applications at 10.5 T.
IEEE Trans Med Imaging
September 2023
For human brain magnetic resonance imaging (MRI), high channel count ( ≥ 32 ) radiofrequency receiver coil arrays are utilized to achieve maximum signal-to-noise ratio (SNR) and to accelerate parallel imaging techniques. With ultra-high field (UHF) MRI at 7 tesla (T) and higher, dipole antenna arrays have been shown to generate high SNR in the deep regions of the brain, however the array elements exhibit increased electromagnetic coupling with one another, making array construction more difficult with the increasing number of elements. Compared to a classical dipole antenna array, a sleeve antenna array incorporates the coaxial ground into the feed-point, resulting in a modified asymmetric antenna structure with improved intra-element decoupling.
View Article and Find Full Text PDFA Monopole and Dipole Hybrid Antenna Array for Human Brain Imaging at 10.5 Tesla.
IEEE Antennas Wirel Propag Lett
September 2022
In this letter, we evaluate antenna designs for ultra-high frequency and field (UHF) human brain magnetic resonance imaging (MRI) at 10.5 tesla (T). Although MRI at such UHF is expected to provide major signal-to-noise gains, the frequency of interest, 447 MHz, presents us with challenges regarding improved B efficiency, image homogeneity, specific absorption rate (SAR), and antenna element decoupling for array configurations.
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