Hi Patrik
They both can conform if you ask them to or not if you tell them not to.
6.0 does a much better job using the native highres data though
cheers
Bruce
On Thu, 1 Feb 2018, Patrik Krumpolec wrote:
Hello!Thank You for the answer. So, If I understand this in good way - version
6.0 works with
original data voxel size and the data are not conformed to voxel size 1x1x1 mm.
Can I ask if also
version 5.3 conform data that have different voxel size from 1x1x1 mm.
Thank You very much!
patrik krumpolec
2018-02-01 16:13 GMT+01:00 Bruce Fischl <fis...@nmr.mgh.harvard.edu>:
Hi Patrik
we report both the number of voxels and the volume of each structure in
the stats files. Even for 1mm data we use partial volume estimation in the
newer versions so that these numbers will not be the same. In general we
find that the partial volume estimation helps accuracy, and that 6.0 is
usually more accurate than 5.2
cheers
Bruce
On Thu, 1 Feb 2018, Patrik Krumpolec wrote:
> I want to ask about differences in brain segmentation with freesurfer
version 5.2.0
and 6.0.0.My
> dicom data have original size 0.375x0.375x0.75 mm and 600, 640, 224
voxels. If I
process the data
> vith the version 5.2.0, freesurfer conformed the data to 1 mm size and
256 voxels for
all
> directions. In the result brain structures has volume eguals to number
of voxels.
> But if i use version 6.0.0, there are data not conformed and in the
results the volume
of structure
> is different form number of voxels.
>
> So, now I don't know what results is correct: from the version 5.2.0 or
6.0.0
>
> At first I think that version 6.0.0 is not good because my collegues
from another
institution have
> results with the volume eguals to number of voxels (version 5.3) but
they have data
with voxel size
> 1x1x1 mm. So, I think that it is natural that volume is eguals to
number of voxels.
But my data have
> not 1x1x1 mm voxel size.
>
> Please, Could You help me! Thank You very much!
>
> patrik krumpolec
>
>
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