in tksurfer tcl scripting you can use:

select_talairach_point <xtal> <ytal> <ztal>

to find the vertex index associated with a tal coord. We never wrote one for volume RAS but we could (or you could apply the tal xform to convert volume ras to tal

cheers Bruce

On Tue, 12 Jan 2010, Oya, Hiroyuki wrote:

Dear EXPERTS,

I have a coordinate set (RAS) in a volume and would like to map those coordinates in a surface of same subjects.

Is there a good way to convert Volume RAS to vertex index directly rather than searching with mouse?

Thank you.

Hiroyuki

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