Design of small-scale gradient coils in magnetic resonance imaging by using the topology optimization method
Pan Hui1, 2, Jia Feng3, †, Liu Zhen-Yu1, ‡, Zaitsev Maxim3, Hennig Juergen3, G Korvink Jan4
       

(color online) Configurations of the optimal z-gradient coil presented in Figs. 7(a) and 7(b) on the current-carrying surface, together with the corresponding distributions of electric potential. Panels (e) and (f) show the corresponding gradient field inaccuracy contours of panels (a) and (c) in xz section. R is radius of current-carrying surface.