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. 2022 Sep 29;10:1801009. doi: 10.1109/JTEHM.2022.3214148

TABLE 3. Endoscope Motion Tracker Rotation Calibration. All Uncertainty Values are Quoted at One Standard Deviation.

Bottom Trackball Top Trackball Reconciled Rotation
Counts per ± 360° (% Uncertainty) 264 ± 15 (5.9 %) 261 ± 12 (4.6 %) 286 ± 10 (3.6 %)
Angular Distance in ° per Count 1.37° ± 0.08° 1.38° ± 0.07° 1.26° ± 0.05°