Hello FSLer's,
So if My data melodic_IC is
Cluster Index Voxels Z-MAX Z-MAX X (vox) Z-MAX Y (vox) Z-MAX
Z (vox) Z-COG X (vox) Z-COG Y (vox) Z-COG Z (vox)
3 2 0.988 34 42 27 34 42
27.5
Then I can say my cluster number 3 with MNI co-ordiante in mm are 34
42 27 and; p-value FWE-corrected using TFCE is < 0.012
if yes then I have a cluster number 9 also
with values as
9 84 1.46 14 52 20 15.9 51.6
20
defining MNI cordinate is OK but How to define p value.
Is there any matter of conflict about the value 1.46
What does this value signify?
Similarly I have a cluster number 14 with a value of 14.7
How we can interpret and report this data
and atlas query results for the cordinate 34 42 27 are
57% Right Cerebral White Matter, 32% Right Putamen, 10% Right Cerebral
Cortex
Can't we say exact area of the particular cluster which consist of only 2
voxels?
Thanks and regards
Since Z-MAX is equal to t value
On Mon, Jan 21, 2013 at 5:08 PM, Gwenaëlle DOUAUD
<[log in to unmask]>wrote:
> See answers below
>
> *De :* Peng Syu-Jyun <[log in to unmask]>
> *À :* [log in to unmask]
> *Envoyé le :* Lundi 21 janvier 2013 6h49
> *Objet :* [FSL] atlasquery & cluster question
>
> Dear exports
> For example, ventral striatum (MNI coordinates in mm: x=**, y=**, z=**;
> t-value=**; p-value FWE-corrected using TFCE=0.0***).
> My result were
> Cluster Index Voxels Z-MAX Z-MAX X (mm) Z-MAX Y (mm) Z-MAX Z (mm) Z-COG X
> (mm) Z-COG Y (mm) Z-COG Z (mm)
> 3 157 0.99 -6 16 -6 -7.97 13.3 -4.91
> atlasquery -a "Harvard-Oxford Subcortical Structural Atlas" -c -6,16,-6
> ==>> 33% Left Cerebral White Matter, 23% Left Accumbens, 13% Left Cerebral
> Cortex
> The t-value was the same
> Z-MAX?
>
> It depends on what you use. Here you have used your *p-value corrected
> using TFCE*, so here the "z-max" is your highest (1-p) value, i.e. your
> *lowest p-value corrected*.
>
> Is right the depiction "p-value FWE-corrected using TFCE=0.05"?
>
> <0.05 for your all your results
>
> How to describe my result as ventral striatum (MNI coordinates in mm:
> x=**, y=**, z=**; t-value=**; p-value FWE-corrected using TFCE=0.0***)?
>
> MNI coordinates in mm: x=-6, y=16, z=-6; p-value FWE-corrected using
> TFCE=0.01
>
>
>
>
>
--
*Himanshu Joshi*
M.Tech. Cognitive & Neuroscience.
Senior Research Fellow
Department of Psychiatry
NIMHANS, Bangalore
http://mbial.weebly.com/himanshu-joshi.html
