ISMRM & ISMRT Annual Meeting & Exhibition • 10-15 May 2025 • Honolulu, Hawai'i

ISMRM & ISMRT 2025 Annual Meeting & Exhibition

Oral

Truly Low-Field MRI

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Truly Low-Field MRI
Oral
Physics & Engineering
Wednesday, 14 May 2025
313C
13:30 -  15:30
Moderators: Ed Wu & Zhiyong Zhang
Session Number: O-77
No CME/CE Credit
13:30 0898. Multi-Shot Multi-Echo xSPEN technique for permanent gradient portable low-field MRI systems
Y. Qiu, P. Lee, S. Chen, K. Dai, C. Wang, Z. Zhang
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
Impact: MSME xSPEN provides a novel image-domain distortionless acquisition approach for highly inhomogeneous low-field MRI systems. This technique will improve image quality and inspire new acquistion strategies in portable single-sided or built-in gradient systems.
13:42 0899. In vivo diffusion-weighted imaging on a point-of-care 46mT Halbach MRI scanner
C. Najac, Y. Dong, B. Lena, R. van den Broek, P. Börnert, A. Webb
C.J. Gorter MRI Center, Radiology, Leiden University Medical Center, Leiden, Netherlands
Impact: We implemented a DWI sequence on a 46mT MRI and acquired data in healthy brains. We evaluated the feasibility of acquiring under-sampled data to fasten acquisition and to use b-values similar to the ones used in clinical practice. 
13:54 0900. A miniaturized low-field MR device: Towards at-home non-invasive health monitoring
R. Dutta Majumdar, Y. Hovav, M. Gajdosik, A. Marriott, J. Ha, S. Takahashi, S. Seha, S. McFadyen, N. Shanmugaratman, T. Li, K. Clocker, B. Chylinski, B. Nashman
Synex Medical, Toronto, Canada
Impact: The development of a novel low-field miniaturized MRS device for providing accurate metabolic data non-invasively represents a major step toward an accurate non-invasive glucose monitor for diabetes management.
14:06 0901. Breaking the EDITER Channel Barrier: Frequency Division Multiplexing for Affordable, Multi-Coil EMI Mitigation
S. A. Srinivas, H. Wilson, J. Stockmann, M. Śliwiak, C. Cooley, W. Grissom
Case Western Reserve University, Cleveland, United States
Impact: We demonstrate a single-channel EMI mitigation method using Frequency Division Multiplexing. This enables more cost-effective EMI mitigation by reducing the need for multiple receiver channels on the console.
14:18 0902. A low-field portable MRI scanner with an elliptic-bore Halbach magnet.
E. Pallás, P. Garcia-Cristobal, F. Galve, T. Guallart-Naval, M. Fernández-García, J. Algarín, J. Borreguero, R. Bosch, J. Conejero, J. Benlloch, J. Alonso
MRILab, Institute for Molecular Imaging and Instrumentation (i3M), Spanish National Research Council (CSIC) and Universitat Politècnica de València (UPV), Valencia, Spain
Impact: This work represents an important step towards imaging in unconventional, remote, rural and underserved settings including small clinics and field hospitals.
14:30 0903. Decoupling Low Field Array Coil Using High Impedance Preamplifier
C. Sun, A. Samardzija, Y. Ha, R. Gross, T. Nixon, S. McIntyre, H. Sun, F. Parra, G. Galiana, R. Constable
Yale University , New Haven, United States
Impact: A simple and efficient method to decoupling array coil at low field is investigated in this work. Without the need of complicated matching and customize-built isolation preamplifier, broadband and sufficient decoupling on array element can be achieved.       
 
14:42 0904. Design of Asymmetric Permanent Magnet Arrays for the development of a Portable MR Head Imager
Z. Shao, Z. Ren
ShanghaiTech university, Shanghai, China
Impact: The proposed asymmetric permanent magnet array significantly improves homogeneity, making it a promising option for portable MRI brain imaging system.
14:54 0905. Wireless Image Data Transmission in Low-Field MRI Using an integrated Radio-Frequency/Wireless Spiral Transmit-Receive Coil
O. Dickinson, E. Wong, A. Song, F. Robb, J. Stockmann, C. Cooley, D. Darnell
Duke University Medical Physics Graduate Program, Durham, United States
Impact: Our work allows portable low-field scanners to wirelessly transmit image data from an emergency vehicle, or home, at a remote location over cellular/satellite networks to enable radiologists at distant hospitals to triage patients and provide guidance for onsite care. 
15:06 0906. Repeatability of rapid T1 mapping of brain tissues at 64 mT: a multicenter study
B. Lena, F. Padormo, R. Teixeira, C. Bennallick, J. Gholam, R. van den Broek, S. Lecurieux Lafayette, I. Vavasour, N. Bourke, T. Karaulanov, M. Cercignani, D. Jones, S. Kolind, J. Hajnal, S. Deoni, S. Williams, A. Webb, P. Sundgren, E. Ljungberg
Leids Universitair Medisch Centrum, Leiden, Netherlands
Impact: Our multi-site study establishes repeatable T1 mapping in vivo and in phantom at 64 mT in a 10-minute protocol, offering robust, quantitative brain tissue characterization suitable for clinical applications in Point-of-Care settings.
15:18 0907. Abdominal Imaging at 0.05 T Using Golden-angle Radial Sampling
Y. Zhao, Y. Ding, S. Su, J. Hu, J. Zhang, A. T. L. Leong, E. X. Wu
The University of Hong Kong, Hong Kong, China
Impact: We demonstrate the feasibility of free-breathing abdominal MRI at 0.05T, potentially offering a low-cost, simplified and patient-friendly approach to visualize tissues and organs. The developments will facilitate ultra-low-field MRI in truly accessible and point-of-care clinical applications.
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