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A ghost correction strategy for Simultaneous Multi‐Slice (SMS) EPI methods that provides improved ghosting artifact reduction compared to conventional methods is presented. Conventional Nyquist ghost correction methods for SMS‐EPI rely on navigator data that contain phase errors from all slices in the simultaneously acquired slice‐group. These navigator data may contain spatially nonlinear phase differences near regions of B₀ inhomogeneity, which violates the linear model employed by most EPI ghost correction algorithms, resulting in poor reconstructions.

Dual‐Polarity GRAPPA (DPG) was previously shown to accurately model and correct both spatially nonlinear and 2D phase errors in conventional single‐slice EPI data. Here, an extension we call Dual‐Polarity slice‐GRAPPA (DPsG) is adapted to the slice‐GRAPPA method and applied to SMS‐EPI data for slice separation and ghost …