Characterization & Correction of Eddy Currents for Ultra-High Field Parallel Transmission with RF Pulse Design

Hai Zheng¹, Tiejun Zhao², Yongxian Qian³, Tamer Ibrahim^1,3, Fernando Boada^1,3

Hardware and experimental imperfections can severely impact the excitation patterns in ultra high field parallel transmission. In this work, we propose a new eddy current correction method combining existing eddy current characterization method for parallel transmission RF pulse design to compensate the overall distortion induced by gradient and RF coils as well as the system delay to reduce the distortions in parallel transmission. Our proposed compensation method is a straightforward and easy to implement, but yields an evident improvement in the performance.