A Double Maxwell Sine Field RF Coil for a TRASE RF Phase Gradient Coil Set

Qunli Deng¹, Scott B. King², Vyacheslav Volotovskyy², Boguslaw Tomanek¹, Jonathan C. Sharp¹

TRASE is a new k-space imaging method which uses transmit RF phase gradients for spatial encoding instead of B0-gradients. RF coil design is particularly important for TRASE as the image quality largely depends upon the RF phase gradient fields. Here we report an improved design for a sine profile field, which is a necessary component of an RF phase gradient set. By considering the concomitant z-directed RF field, and by 2D and 3D simulations, a double Maxwell design was arrived at and constructed. The double Maxwell coil shows a 91% larger imaging volume than the previous single Maxwell design.