Functional principal component model for high-dimensional brain imaging.
Functional principal component model for high-dimensional brain imaging.
复制标题
高维脑成像的功能主成分模型。
DOI:
10.1016/j.neuroimage.2011.05.085
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发表时间:
2011-10-01
期刊:
影响因子:
5.7
通讯作者:
Crainiceanu, Ciprian
中科院分区:
文献类型:
--
作者:
Zipunnikov, Vadim;Caffo, Brian;Yousem, David M.;Davatzikos, Christos;Schwartz, Brian S.;Crainiceanu, Ciprian
We explore a connection between the singular value decomposition (SVD) and functional principal component analysis (FPCA) models in high-dimensional brain imaging applications. We formally link right singular vectors to principal scores of FPCA. This, combined with the fact that left singular vectors estimate principal components, allows us to deploy the numerical efficiency of SVD to fully estimate the components of FPCA, even for extremely high-dimensional functional objects, such as brain images. As an example, a FPCA model is fit to high-resolution morphometric (RAVENS) images. The main directions of morphometric variation in brain volumes are identified and discussed.
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