Presented on a magnitude brain phantom underlay are theoretical operator induced real/real, imaginary/imaginary, real/imaginary spatial correlations, and temporal correlations of the center voxel under the assumption of SENSE reconstruction and smoothing with (a1–a4) identity intrinsic k-space covariance, (b1–b4) nonidentity intrinsic k-space covariance, (c1–c4) band-pass filtering with identity intrinsic k-space covariance, (d1–d4) band-pass filtering with nonidentity intrinsic k-space covariance. The intrinsic spatial correlation masks for the considered cases are illustrated in (a5–d5).