ISMRM25 - Magnetic Fields & Their Discontents

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

Magnetic Fields & Their Discontents

Oral

Physics & Engineering

Thursday, 15 May 2025

312

15:30 - 17:30

Moderators: Christoph Juchem & Soudabeh Kargar

Session Number: O-74

No CME/CE Credit

15:30		1333. Prostate Diffusion-Weighted Imaging with an Inside-Out Nonlinear Gradient Coil PDF Poster View Presentation Video H. Zhang, N. Elsaid, J. Weinreb, G. Galiana Yale University, New Haven, United States Impact: The proposed inside-out nonlinear gradient coil provides easy access to strong gradient for high-SNR and high-CNR prostate DWI, which can be flexibly installed for clinical scanners and facilitates triage, diagnosis, and surveillance of prostate cancer.
15:42		1334. Mechanical Resonance Characterization by Gradient System Transfer Function View Presentation Video X. Zheng, M. Li, K. Wang GE HealthCare, Beijing, China Impact: Our study offers solid evidence for explaining the frequency peaks of GSTF, which is beneficial for avoiding the resonance frequency points by frequency lockout methods when setting scanning parameters.
15:54		1335. Impact of through-slice gradient regularization for dynamic slice-wise B0 shimming in the brain and spinal cord View Presentation Video A. Breheret, A. D'Astous, Y. Ma, J. Stockmann, J. Cohen-Adad Polytechnique Montreal, Montreal, Canada Impact: Dynamic shimming with AC/DC coils, optimized through signal recovery regularization, enhances the precision and quality of gradient-echo imaging, enabling more reliable functional MRI studies in regions prone to high susceptibility distortions.
16:06		1336. Imaging at 400 mT/m with next-generation gradient driver technology on a high-performance gradient platform. View Presentation Video N. Abad, E. Fiveland, J. Hotaling, A. Siddavatam, R. Hassan, S-K Lee, E. Budesheim, A. Zhu, J. Ricci, M. Freeman, J. Stich, A. Panos, S. Kurucay, L. Snow, T. B. D. Yeo, T. Foo GE HealthCare, Technology & Innovation Center, Niskayuna, United States Impact: Cumulative gains from gradient coil design and gradient driver topology enable imaging of the mesoscale, with increased sensitivity in estimation of elusive contrasts such as slow-flow characterization of neuro-fluids, effective intra-axonal radii, and time-dependent diffusivities.
16:18		1337. A Low Inductance Nonlinear Gradient Array Design to Mitigate PNS and Reduce Voltage for Extension to Ultrasonic Whole-Body Fast and Silent MRI View Presentation Video E. van Riel, M. McGrory, T. Roos, K. Meng, D. Klomp, J. Siero, E. Versteeg UMC Utrecht, Utrecht, Netherlands Impact: Whole-body silent MRI is necessary to improve patient comfort. Here, we show a nonlinear gradient-array is a viable option to avoid PNS while achieving ultrasonic switching rates. This suggests whole-body fast and silent MRI is possible with a gradient-array design.
16:30		1338. dB/dt Camera for Gradient Eddy Current Mapping Outside the Magnet View Presentation Video S-K Lee, R. Hinks GE HealthCare Technology and Innovation Center, Niskayuna, United States Impact: The proposed method enables time-resolved gradient eddy current field mapping without the magnet or power electronics. The method can help isolate eddy current sources in the gradient coil or RF subsystem.
16:42		1339. Bilateral breast gradient insert prototype for strong diffusion encoding at 3T View Presentation Video G. Arends, E. Versteeg, F. Jia, R. Valentijn, E. Cooijmans, D. Klomp, M. Zaitsev, C. Tax, S. Littin University Medical Center Utrecht, Utrecht, Netherlands Impact: This setup presents a first step toward a dedicated MRI system for bilateral breast cancer screening using diffusion MRI. It can offer a cost-effective alternative to current screening methods, requiring no contrast agents.
16:54		1340. Design, modeling, construction and first experimental results of the ultra high performance H12 insertable head gradient set for 10.5T View Presentation Video B. Rutt, P. Roemer, K. Ertan, A. Alejski, T. Wade, M. Bester, A. Bratch, E. Auerbach, G. Adriany, K. Ugurbil Stanford University, Stanford, United States Impact: H12 gradient performance (Gmax*Smax) is considerably higher than other state-of-the-art gradient coils. When combined with 10.5T B0, we expect that H12 will provide major sensitivity and resolution increases for dMRI and fMRI. Experimental results to date are confirming these expectations.
17:06		1341. Non-Cartesian Imaging on a Head-Only System: Impact and Correction of Higher Order Eddy Currents View Presentation Video S. Kecskemeti, A. Alexander, J. Holmes, K. Johnson University of Wisconsin - Madison, Madison, United States Impact: Non-Cartesian imaging can now be performed on the head only MAGNUS MRI scanner without degradation due to non-linear eddy currents.
17:18		1342. 1.5 T whole-body superconducting MRI system with a conduction cooling design View Presentation Video W. Wang, H. Wang, F. Liu University of Queensland, Brisbane, Australia Impact: The developed conduction-cooled superconducting magnet technology will significantly impact the industry and broaden MRI applications.

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