mni2tal.Rdmni2tal for converting from ch2/mni space to tal - very approximate.
mni2tal(xin = 0)output point in approximate Talairach space.
This is a standard approach but it's not very accurate.
mni2tal(c(10, 12, 14))
#> [1] -9.9000 -10.9816 13.4466