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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: Magn Reson Med. 2017 Jul 19;79(4):1911–1921. doi: 10.1002/mrm.26838

Figure 4.

Figure 4

Simulation environment and ‘mean voxel displacement’ (MVD) calculation. Point clouds representing all n voxels inside the head model are used to calculate the mean voxel displacement (MVD) between consecutive time points (p and q, here). This is summed over the entire scan (see Fig. 5) to serve as a metric to quantify motion that occurred or remained uncorrected.