fslswapdimfslswapdim(file, outfile = NULL, retimg = FALSE, reorient = FALSE,
intern = TRUE, a = "x", b = "y", c = "z", verbose = TRUE, ...)readNIfTI.systemfslswapdimfslswapdimfslswapdimreadNIfTI.retimg then object of class nifti. Otherwise,
Result from system command, depends if intern is TRUE or FALSE.