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. 2016 Jan 8;17(1):246–258. doi: 10.1120/jacmp.v17i1.5888

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© 2016 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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The number of principal modes needed to achieve 90% of the total variations as a function of the number of training deformation vector fields (DVFs). The number of principal modes was obtained through interpolation. For example, with 20 training DVFs, four and five principal modes achieved 88% and 91% of the total variations, respectively. After interpolation, 4.7 principal modes were needed to achieve 90% of the total variations.