tend-bfit - Man Page
non-linear least-squares fitting of b-value curves
Synopsis
tend bfit [@file ...] [-i <nin>] -b <b1 b2 ...> [-w <w1 w2 ...>] [-imax <# iter>] [-eps <epsilon>] [-o <nout>]
Description
Non-linear least-squares fitting of b-value curves. Axis 0 is replaced by three values: amp, dec, err, based on a non-linear least-squares fit of amp*exp(-b*dec) to the range of DWI values along input axis 0, as a function of changing b values.
Options
- @file ...
response file(s) containing command-line arguments
- -i <nin>
Input nrrd. List of DWIs from different b-values must be along axis 0; default: “-”
- -b <b1 b2 ...>
b values across axis 0 of input nrrd (2 or more doubles)
- -w <w1 w2 ...>
weights for samples in non-linear fitting (2 or more doubles)
- -imax <# iter>
max number of iterations to use in non-linear fitting, or, use 0 to do only initial linear fit (int); default: “10”
- -eps <epsilon>
epsilon convergence threshold for non-linear fitting (double); default: “1”
- -o <nout>
output tensor volume (string); default: “-”