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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