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. Author manuscript; available in PMC: 2015 Nov 7.
Published in final edited form as: J Biomech. 2014 Sep 28;47(14):3475–3481. doi: 10.1016/j.jbiomech.2014.09.010

Figure 2.

Figure 2

Angular position θ versus time for 30 rotations measured using an MRI-compatible angular position sensor. (a) In the gelatin phantom, the motion is highly repeatable whether the rotations are aligned at rest (0° rotation) or after a 29° rotation. (b) Rotations in live human subjects are more variable. Temporal variations can lead to image distortions. If the rotations are aligned at rest, then the standard deviation of the time to peak angular acceleration is 18.4 ms. Aligning the rotations after 29° rotation reduced the standard deviation at peak acceleration to 2.8 ms.