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Table 2 Descriptive statistics of continuous 3D head motion between single consecutive ExacTrac measurements (Δ3DV) within a treatment session

From: Intrafractional 6D head movement increases with time of mask fixation during stereotactic intracranial RT-sessions

Time [min]NΔ3DV Mean [mm]SDConfidence interval of the mean
LowerUpper
0–2680.210.260.150.27
2–41130.290.290.240.35
4–6870.390.420.300.48
6–8720.520.420.420.61
8–10580.610.530.470.75
10–12330.530.380.400.67
> 12220.660.410.470.84