The accuracy of our method for 10 study patients with various strips and grids. C1: Type and number of the implanted electrode arrays, G: Grid electrodes, S:Strip electrodes and D: Depth electrodes, the number of each array type is shown by a number after colon, and the arrays visible in the photos are indicated in brackets, C2: The number of visible electrodes in the photos, C3–C5: min, max and median of the error (mm), C6: mean±SD of the error (mm), C7: Residuals of strip electrode distance from the considered plane P (mean±SD mm) as described in Section 2.2.5.