Localization errors for phantom measurements.

Aligned by electrodes (A,B) or by fiducials (C,D). Individual results are shown in (A) and (C), with each box-and-whisker corresponding to a single dataset and each point corresponding to localization error for a single electrode. Grouped results are shown in (B) and (D), with each point corresponding to a scalar RMSE error aggregated from a single dataset. Labeled values in (B) and (D) indicate p values from uncorrected two-tailed Welch’s t-tests.