‘btable.txt’ is an alias for ‘dsi203_bmax4000’, a (nx4) b-table data file used in conjunction with the data set ‘data.nii.gz’ (alias "DSI 203-point 3mm"), as provided by the Advanced Biomedical MRI Lab, National Taiwan University Hospital, and referenced in the package DSI_Studio developed by Fang-Cheng Yeh. The first column specifies the b-values, and the remaining 3 columns specify the b-vectors.
‘btable.txt’ The sampling points in ‘btable.txt’ (‘dsi203_bmax4000’) are distributed in a S2 shell with 203 points. The b-values range from 0 to 4000.
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.