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 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! --- 10ÿÿ8ÿÿ6ÿÿÿÿÿÿÿÿ, Bruce Fischl fischl@nmr.mgh.harvard.edu ÿÿÿÿÿÿ
ÿÿÿÿÿÿ: Bruce Fischl fischl@nmr.mgh.harvard.edu ÿÿÿÿ: Re: [Freesurfer] hippocampus volume ÿÿÿÿÿÿ: "Zhangyuanchao" woshizhangyc@yahoo.cn ÿÿÿÿ: freesurfer@nmr.mgh.harvard.edu ÿÿÿÿ: 2010ÿÿ8ÿÿ6ÿÿ,ÿÿÿÿ,ÿÿÿÿ10:59
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 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 respectively? Could you explain how to measure subcortical volume in detail? Do the volume corresponding to other subcortical structures have the same problem as the hippocampus? Is there any detailed description on aseg.stats? Thanks!
--- 10ÿÿ8ÿÿ6ÿÿÿÿÿÿÿÿ, Pedro Paulo de Magalhães Oliveira Junior ppj@netfilter.com.br ÿÿÿÿÿÿ
ÿÿÿÿÿÿ: Pedro Paulo de Magalhães Oliveira Junior ppj@netfilter.com.br ÿÿÿÿ: Re: [Freesurfer] hippocampus volume ÿÿÿÿÿÿ: "Zhangyuanchao" woshizhangyc@yahoo.cn ÿÿÿÿ: freesurfer@nmr.mgh.harvard.edu ÿÿÿÿ: 2010ÿÿ8ÿÿ6ÿÿ,ÿÿÿÿ,ÿÿÿÿ10:22
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, 2010 at 11:17, Zhangyuanchao woshizhangyc@yahoo.cn 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 folder stats, there is a file named aseg.stat, where I can find a line which contains "ColHeaders Index SegId NVoxels Volume_mm3 StructName normMean normStdDev normMin normMax normRange", I wonder whether the corresponding volume of the Left-hippocampus is what I want. I mean the volume of the left hippocampus. Thanks a lot ! Yuanchao Zhang _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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