cd $SUBJECTS_DIR/$subject Sample the aseg onto the surface (looking for the max between -2 and + 2 mm). This will sample all the segmentations, but we are only interested in CC mri_vol2surf --regheader $subject--mov aseg.mgz --projdist-max -2 .5 2 --o lh.aseg.mgz --hemi lh Create a binary map of just the CC mri_binarize --i lh.aseg.mgz --match 251 252 253 254 255 --o lh.cc.mgz Compute the area in the binary map mri_segstats --i ../surf/lh.area --accumulate --id 1 --seg lh.cc.mgz --sum sum.cc.dat You'll see something that looks like this in the file: # ColHeaders Index SegId NVoxels Volume_mm3 StructName Mean StdDev Min Max Range 1 1 1357 1357.0 Seg0001 1028.3962 0.3208 0.0310 2.1589 2.1279 The total area will be under the "Mean" column, 1028.3962 mm2 in this case As I said, this has not been validated in anyway so use with caution
On 9/29/2019 1:49 PM, Fernanda Hansen P. de Moraes wrote:
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Thank you very much. I am very interested in this if it is possible. Is it possible to acquire any other area information of the corpus callosum?
Thank you again, Fernanda
Em qua, 25 de set de 2019 às 21:10, Greve, Douglas N.,Ph.D. <DGREVE@mgh.harvard.edumailto:DGREVE@mgh.harvard.edu> escreveu: We don't output or have tools to compute it. I can tell you how you can get a number for it, but it would not be with a validated method. Let me know.
On 9/24/2019 5:37 AM, Fernanda Hansen P. de Moraes wrote:
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Dear Freesurfer experts,
how can I extract the corpus callosum cross sectional area for each hemisphere?
Thank you very much in advance, Fernanda Hansen P. de Moraes
fernandahmoraes@gmail.commailto:fernandahmoraes@gmail.com Física Médica | Rede D'Or São Luiz Doutoranda em Ciências Médicas | Instituto D'Or de Pesquisa e Ensino
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-- Fernanda Hansen P. de Moraes
fernandahmoraes@gmail.commailto:fernandahmoraes@gmail.com Física Médica | Rede D'Or São Luiz Doutoranda em Ciências Médicas | Instituto D'Or de Pesquisa e Ensino
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