Hi FSL experts:
I am analyzing resting-state functional connectivity data using ICA
and cluster-based thresholding. Two groups are studied (patients
[n=18] vs. controls [n=23]). When I check the higher level FEAT
results (report.html), there are time-series plots (of the peak Z
voxel) for each contrast (control group, patient group,
control-patient, patient-control, 4 contrast in total for my study).
My questions are:
1. What are the y values of the Time-series plots? Are they beta
weights or z values? As I know, the x value (0-50) is the numbers of
the subject.
2. When I click the plots for each contrast, two plots of full-model
fit will pop up. Then I click the "raw data", a four-colume text file
will pop up. In this text file, I think the values of the most left
colume are the y values of the time-series plot (as question 1).
Columes 2 and 3 seems to be contrast-specific values. But I have no
idea what are the values in the most right columes.
3. When I click on a cluster of activation on the color rendered FEAT
stats, a webpage of "cluster List" table will appear. I would like to
ask what are the values of Z COG X (mm), Z COG Y and Z COG Z? Another
question is: why the Z MAX coordinate and COPE MAX coordinate are
different?
Thanks!!
Best,
Wei-Ta Chen, MD, PhD
Taipei Veterans General Hospital
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