Re: [Freesurfer] Command line to map volume data to surface data

It's an empirical relationship based on the number of iterations needed to get a delta function to look like a gaussian of a certain FWHM. You can still specify the number of iterations with --nsmooth. See the --help. doug On 8/5/10 5:34 PM, Xinian Zuo wrote: > Nice to know the gold standard

[Freesurfer] eTIV and aseg.stats

Hi all, I have read about the eTIV and how to obtain it in the paper from Buckner et al. but I have a question related to the implementation of it in Freesurfer, just to be sure that I have correctly understood it. Regarding the volumes of the subcortical structures presented in "aseg.stats", are

Re: [Freesurfer] Command line to map volume data to surface data

Thank you very much, Doug! On Fri, Aug 6, 2010 at 9:24 AM, Douglas Greve wrote: >  It's an empirical relationship based on the number of iterations needed to > get a delta function to look like a gaussian of a certain FWHM. You can > still specify the number of iterations with --nsmooth. See the

Re: [Freesurfer] eTIV and aseg.stats

no, all volumes are in native space. We also provide the eTIV so you can do whatever you want for correction. cheers Bruce On Fri, 6 Aug 2010, Yolanda Vives wrote: > Hi all, > > I have read about the eTIV and how to obtain it in the paper from Buckner > et al. but I have a question related to

[Freesurfer] hippocampus volume

Hi, expert,   I would like to measure the volume of hippocampus, is there any way i can obtain the raw volume of hippocampus for each subject? How can I obtain it?   In fact, in the folder stats, there is a file named aseg.stat, where I can find a line which contains "ColHeaders  Index SegId NVox

Re: [Freesurfer] hippocampus volume

look at the aseg.stats sum left with right - Pedro Paulo de Magalhães Oliveira Junior Diretor de Operações Netfilter & SpeedComm Telecom -- www.netfilter.com.br -- For mobile: http://www.netfilter.com.br/mobile On Fri, Aug 6,

Re: [Freesurfer] hippocampus volume

the Volume_mm3 entry is the raw volume in native space. cheers Bruce On Fri, 6 Aug 2010, Zhangyuanchao wrote: Hi, expert,   I would like to measure the volume of hippocampus, is there any way i can obtain the raw volume of hippocampus for each subject? How can I obtain it?   In fact, in the fo

Re: [Freesurfer] hippocampus volume

hi, thanks for your quick reply.   I am a little puzzled, if volume of the line corresponding to Left hippocampus is the sum of the left and the right, why the volume corresponding to the right hippocampus is different from the left? How can I obtain the left and right volume of hippocampus resp

Re: [Freesurfer] hippocampus volume

the volume of each is given separately. I think what PPJ was saying is that you can sum them to get the total if you want On Fri, 6 Aug 2010, Zhangyuanchao wrote: hi, thanks for your quick reply.   I am a little puzzled, if volume of the line corresponding to Left hippocampus is the sum of th

{Disarmed} [Freesurfer] {Disarmed} Re: hippocampus volume

ok, however, why it is larger than I expected, the volume of one hippocampus  from aseg.stats is larger than 4000mm^3, but I noticed that the hippocampus volume for each hemisphere from ADNI data is mostly between 2000mm^3-3000mm^3, I do not know why the difference is so great.   Thanks!       -

Re: [Freesurfer] {Disarmed} {Disarmed} Re: hippocampus volume

are your subject elderly or do they have AD? The ADNI subjects will hae smaller than normal hippocampal volumes On Fri, 6 Aug 2010, Zhangyuanchao wrote: ok, however, why it is larger than I expected, the volume of one hippocampus  from aseg.stats is larger than 4000mm^3, but I noticed that 

[Freesurfer] Normalization of wmparc.stats?

Hi all, Regarding the white matter parcellations in the wmparc.stats file, is it necessary to normalize these values by eTIV or by another factor? Or should this step be skipped as with the cortical thickness measures (?h.aparc, etc.)? Thanks! -Jason

[Freesurfer] mapping surface file??

Hi! I was able to use mri_convert to reslice aprc+aseg.mgz to the original dicom coordinates/space. However, I wonder if I need to do the same for all surface files, i.e. mapping vertex coordinate to different one. If I need to do that, which utility should I use? Gen