refund (version 0.1-11)

DTI2: Diffusion Tensor Imaging: more fractional anisotropy profiles and outcomes

Description

A diffusion tensor imaging dataset used in Swihart et al. (2012). Mean diffusivity profiles for the corpus callosum (cca) and parallel diffusivity for the right corticospinal tract (rcst). Accompanying the profiles are the subject ID numbers, visit number, and Paced Auditory Serial Addition Test (pasat) score. We thank Dr. Daniel Reich for making this dataset available.

If you use this data as an example in written work, please include the following acknowledgment: ``The MRI/DTI data were collected at Johns Hopkins University and the Kennedy-Krieger Institute"

Note: DTI2 uses mean diffusivity of the the corpus callosum rather than fractional anisotropy (FA), and parallel diffusivity of the rcst rather than FA. Please see the documentation for DTI for more about the DTI dataset.

Usage

data(DTI2)

References

Goldsmith, J., Bobb, J., Crainiceanu, C., Caffo, B., and Reich, D. (2011). Penalized functional regression. Journal of Computational and Graphical Statistics, 20(4), 830--851. Goldsmith, J., Crainiceanu, C., Caffo, B., and Reich, D. (2012). Longitudinal penalized functional regression for cognitive outcomes on neuronal tract measurements. Journal of the Royal Statistical Society: Series C, 61(3), 453--469.

Swihart, B. J., Goldsmith, J., and Crainiceanu, C. M. (2012). Testing for functional effects. Johns Hopkins University Dept. of Biostatistics Working Paper 247. Available at http://biostats.bepress.com/jhubiostat/paper247