Figure 3.

Prior to eddy-current compensation, a general trend toward higher eddy-current-induced gradients with greater d_grad/d_magnet is observed for the sample of MRI systems in this study. The quantity d_grad represents the gradient i.d., while d_magnet is the magnet bore diameter. For purposes of this plot, overall eddy-currents are represented as a sum of all of the on-axis (x → x, y → y, z → z) eddy-current decay components shown in Table 3 (e.g., in terms of Eq. 15, Σ_{j = x,y,z} Σ_i A_i ×100%).