Hi,
The units used by fslstats are mm^3 (or voxels) but not cm^3.
All the best,
Mark
On 29 May 2014, at 15:13, Elias <[log in to unmask]> wrote:
> Dear all,
>
> I want to get grey matter, white matter and CSF volume measurements from a specific ROI which is 20 x 20 x 20 mm. I used
> FAST to segment the whole brain and got the three classes images (i.e. pve_0, pve_1, pve_2). Then in order to look the specific volume I created an ROI for each tissue. For example for grey matter
>
> fslroi struct_brain_pve_1 struct_brain_GM x 20 y 20 z 20
>
> then output for each tissue with:
>
> fslstats struct_brain_GM -M -V
>
>
> However, when I look at the volume estimates for each tissue they add up to approx 10700 cm3, which is impossible since a 20 x 20 x 20 volume has 8000 cm3....
>
> Is the method I am using correct or am I missing something really obvious?
>
> Many thanks in advance
>
>
> Elias
|