gdimap (version 0.1-3)

data: A Real Dataset for Diffusion MRI Analysis

Description

The data set data.nii.gz is a gzipped NIfTI data set converted from the original DICOM data set provided by the Advanced Biomedical MRI Lab, National Taiwan University Hospital, under the designation DSI 203-point 3mm.

For reasons of limited CRAN storage space, a trimmed down data set with just 4 coronal slices was selected. Coronal slices (29:32) were extracted from the original data set. Hence, the argument bview="coronal" is used in the examples, and the range of coronal slices is (1:4). User specified complete data sets may be used without restrictions.

format

The file data.nii.gz is in gzipped NIfTI format. The R-package oro.nifti is required to read NIfTI files.

Details

The data set is included in the DSI Studio package, publicly available from the NITRC repository. This data set is from a normal 24-year-old male volunteer, and has been provided as a demonstration data set in connection with the DSI Studio software for diffusion MR image analysis. The data set was obtained with an echo planar imaging diffusion sequence with twice-refocused echo, dimension 64x64x40, and slice thickness 2.9mm. Further details on the data set specification are available from the NITRC repository.

References

Whitcher, B., Schmid, V. J., and Thornton, A. Working with the DICOM and NIfTI data standards in R. Journal of Statistical Software 44, 6 (2011), 1-28.

Yeh, F.-C., Wedeen, V. J., and Tseng, W.-Y. I. Generalized q-Sampling Imaging. IEEE Transactions on Medical Imaging 29, 9 (2010), 1626--1635.

NITRC repository, http://www.nitrc.org.

See Also

data_brain_mask, data.bval, data.bvec, data_V1, data_V2, data_gfa, btable