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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: Phys Med Biol. 2010 Jan 7;55(1):305–327. doi: 10.1088/0031-9155/55/1/018

Table 3.

Polynomial trajectory model spatial accuracy.

Polynomial Order
linear quadratic cubic quartic quintic
3D Euclidean Error p-value* 1.89 (1.76) 6.36 × 10-6 1.27 (1.41) 1.25 (1.43) 1.23 (1.42) 1.22(1.42)

Mean errors presented in millimeters (mm) with pooled standard deviations (SD) in parentheses.

*

Tested using the nonparametric Friedman rank sum test.