No there isn't, but you can write your own tcl script.
Here is an example how you could do it:
http://www.mail-archive.com/freesurfer@mail.nmr.mgh.harvard.edu/
msg00958.html
What you're interested in is the tcl commands:
set rgb
set val
sclv_read_binary_values 0
redraw
save_rgb
Mark
On May 19,
Hi. I would like to report two bugs in CSURF, and also ask for a hint
about using it.
BUGS:
1. If you save an image to TIFF or RGB, the screen does not redraw
itself before saving. Therefore, any menus or windows that might have
drawn over the image will get saved into the file. This bug can be
