Hi Sarah
I don't think we have anything for ellipsoid fitting, although Oliver
Hinds did some in his paper on V1. Should be straightforward enough in
matlab. The data are in 2D mm coords
cheers
Bruce
On Tue, 12 May 2015, Sarah Finnegan wrote:
Hi Bruce
Thanks for the information on the flat patch, thats great that the
relationships are preserved!
With that in mind do you know if freesurfer has any inbuilt functions to
take the kind of measurements that I was describing? Or will my MATLAB based
proposal be the best option do you think?
Thanks again!
Sarah
____________________________________________________________________________
From: Sarah Finnegan
Sent: 11 May 2015 17:13
To: Freesurfer support list [freesurfer@nmr.mgh.harvard.edu]
Subject: Taking a measure of cluster width and length on flat surface
Dear all,
I am looking to take two measures within the visual cortex.
1) A measure of width and length for each activation cluster overlaid onto
the flattened cortical surface.
2) A measure of spacing between each cluster
I can find how to take measures of area but I specifically want to know the
width and length separately to correlate this to potential stripe systems.
My plan was to fit an oval to each of these clusters and measure length
through the cardinal axis and width through the minor, spacing would be
calculated from a line fit to the minor axis of each cluster. Unfortunately
I think the unfolding process will have changed the spacing relationships
between clusters to make this inappropriate.
I wonder if there is a command or established pipeline to take such
measures?
Thanks for your help!
Sarah
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