Asymmetric Gradient Coil Design by Numerical Approach for MRI Brain Imaging

A design example of an asymmetric transverse gradient coil by a numerical approach is presented in this paper. The gradient coil is designed for brain imaging by ultra-high field MRI. The coil can achieve high gradient strength and high slew rate due to its small diameter. The wire pattern of the coil is asymmetric with the diameter spherical volume (DSV) located close to the edge of the coil, which enables the head of the subject to reach the DSV. A corresponding shield coil is also designed to suppress the induced eddy currents in surrounding structures.