Hi freesurfer experts: i'm using qdec to perform statistical analysis in Freesurfer 5.0.0, within 'Measure' menu in 'Design' tab, the default is 'thickness', however, there are other measurements such as 'area' and 'area.pial'. the latter seems meaning area in pial surface. what does the former mean? does it mean area in white matter surface?
That is the area of the white surface. But don't use this unless you have updated to the new version of mris_preproc. doug
On 2/27/12 8:15 PM, ZhiLiangLong wrote:
Hi freesurfer experts: i'm using qdec to perform statistical analysis in Freesurfer 5.0.0, within 'Measure' menu in 'Design' tab, the default is 'thickness', however, there are other measurements such as 'area' and 'area.pial'. the latter seems meaning area in pial surface. what does the former mean? does it mean area in white matter surface?
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Hi Doug,
What does the new version of mris_preproc do with area?
Don
Date: Mon, 27 Feb 2012 20:54:43 -0500 From: greve@nmr.mgh.harvard.edu To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] In Qdec, what does the 'area' mean within 'Measure' menu in 'Design' tab
That is the area of the white surface. But don't use this unless you have updated to the new version of mris_preproc.
doug
On 2/27/12 8:15 PM, ZhiLiangLong wrote:
Hi freesurfer experts: i'm using qdec to perform statistical analysis in Freesurfer 5.0.0, within 'Measure' menu in 'Design' tab, the default is 'thickness', however, there are other measurements such as 'area' and 'area.pial'. the latter seems meaning area in pial surface. what does the former mean? does it mean area in white matter surface?
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_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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When mapping the area (or volume) to a target surface it assures that the sum of the area over all vertices of the target is equal to that of the source (conservation). The basic idea is that the area of a patch in the target space should be the area of the patch when mapped to the source space (though this cannot be rigidly adhered to as the patch gets smaller and smaller). a new version is here
ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/mris_preproc
doug
On 2/28/12 10:47 AM, Don Hagler wrote:
Hi Doug,
What does the new version of mris_preproc do with area?
Don
Date: Mon, 27 Feb 2012 20:54:43 -0500 From: greve@nmr.mgh.harvard.edu To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] In Qdec, what does the 'area' mean within 'Measure' menu in 'Design' tab
That is the area of the white surface. But don't use this unless you have updated to the new version of mris_preproc. doug
On 2/27/12 8:15 PM, ZhiLiangLong wrote:
Hi freesurfer experts: i'm using qdec to perform statistical analysis in Freesurfer 5.0.0, within 'Measure' menu in 'Design' tab, the default is 'thickness', however, there are other measurements such as 'area' and 'area.pial'. the latter seems meaning area in pial surface. what does the former mean? does it mean area in white matter surface? _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
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ZhiLiangLong