Thanks Steve. I think avwroi just gives the single voxel image. This is
the too slow to run. I would like to try the second way by writtng some
c/c++ code. In the avwutils, there are lots commond there. Could you
please tell me which one is the best one to modify and how can I get the
source code? Also what's mean "add in that functionlity"? I am looking
forward to hearing from you. wei
On Mon, 10 Feb 2003, Stephen Smith wrote:
> Hi - there's currently not a program to do this directly. You could quite
> easily script this (eg in tcl) to call, inside a loop, avwroi to give a
> single-voxel image and then extract the values using avwstats. this would
> be very slow to run, but would at least be easy! A better thing would be
> to just edit one of the avwutils C/C++ programs and add in that
> functionality.
>
> Thanks, Steve.
>
>
>
> On Sun, 9 Feb 2003, Wei Qiu wrote:
>
> > Hi,
> >
> > In my cluster_mask_zstat1.hdr file in the .feat directory, I have two
> > clusters: cluster 1 and cluster 2. Using the following command, I
> > generate a mask for cluster 2:
> >
> > avwmaths cluster_mask_zstat1.hdr -mult -1 -thr -2 -mult -1 -thr 2
> > mask_cluster2
> >
> > Appy this mask to thresh_zstat1.hdr:
> >
> > avwmaths thresh_zstat1 -mas mask_cluster2 cluster2output.hdr
> >
> > Then convert the cluster2output.hdr to a text file:
> >
> > avw2ascii cluster2putput.hdr cluster2output.txt
> >
> > I found the text file (cluster2output.txt) contails Z values for all
> > voxels in cluster 2, setting Z values to 0 for other voxels. My quesion
> > is: How can I get the coordinates (x, y, and z values for each voxel) of
> > all voxels in cluster 2? And the same thing for cluster 1?
> >
> > Any suggestion for this purpose (finding coordinates (x, y, z) of all
> > voxels in a specific cluster) is greatly appreciated.
> >
> > Thanks,
> >
> > Wei
> >
>
> Stephen M. Smith MA DPhil CEng MIEE
> Associate Director, FMRIB and Analysis Research Coordinator
>
> Oxford University Centre for Functional MRI of the Brain
> John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
> +44 (0) 1865 222726 (fax 222717)
>
> [log in to unmask] http://www.fmrib.ox.ac.uk/~steve
>
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