Flexible use of AC/DC coil for eddy-currents and concomitant fields mitigation with applications in diffusion-prepared non-Cartesian sampling

作者：Congyu Liao, Jason Stockmann, Xiaozhi Cao, Zhitao Li, Lincoln Craven‐Brightman, Monika Śliwiak, Charles Biggs, Zheng Zhong, Nan Wang, Hua Wu, Thomas Grafendorfer, Fraser Robb, Bernhard Gruber, Azma Mareyam, Adam B. Kerr, Kawin Setsompop · 发表于：Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition · 年份：2024 · DOI：10.58530/2023/1236 · 研究领域：Advanced MRI Techniques and Applications、NMR spectroscopy and applications、Non-Destructive Testing Techniques

This work provides a demonstration that the AC/DC shim-array can be flexibly used to correct undesirable eddy-current and concomitant fields effect in MRI acquisitions, with simulation results showing its effectiveness at mitigating eddy-current induced phase in diffusion-prepared acquisition and in mitigating concomitant fields in non-Cartesian trajectories, such as spiral. Phantom and invivo experiments were also performed on a 46-channel AC/DC shim-array to demonstrate high-fidelity multi-shot 3D diffusion-prepared acquisition without need for SNR-zapping amplitude stabilizer.