Optimized B0 and B1+ insensitive RF pulses for non-selective T2 and diffusion preparation

作者：Xuetong Zhou, Brian A. Hargreaves, Philip Lee · 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：10.58530/2023/5267 · 被引用次数：1 · 研究领域：Advanced MRI Techniques and Applications、Electron Spin Resonance Studies、Ultrasound and Hyperthermia Applications

The performance of conventional T2 or diffusion preparation using linear phase pulses or adiabatic pulses is limited by the B1+ and B0 field inhomogeneities, particularly relevant in body imaging. In this work, we proposed a numerical optimization strategy to design RF pulse pairs for non-selective T2 or diffusion preparation that perform robustly over a wide range of B1+ and B0 variations. Phantom and in vivo experiments compared the performance of preparation using the optimized pulses to that of linear-phase and adiabatic pulses.