Hi
I have been trying to complete a meta-ICA of resting-state data (aiming to complete an analysis along the lines of Biswal et al. 2010) using 2 different methods through melodic, and I have had no success.
The files concatenated in the two methods were melodic_IC.nii.gz files from group ICAs completed for each run separately(using all the same subjects just different subject concatenation orders).
I realize my lack of success could be completely due to an incorrect choice of .nii.gz files from each melodic run as inputs in the meta-ICA. Is this the case? If so, which files are those I should use as input into a meta-ICA?
If this is not the case, I was hoping that you could provide me with some guidance as how to successfully set up a meta-ICA analysis for resting state data.
To provide some context regarding the setup and data used in my failed attempts, you will find more information below.
Thank you in advance!
Krista
Each run was completed with enforced dimensionality of 20 components, included 5 inputs of preprocessed individual subject data, which were resampled at 2mm resolution during the registration sequence in melodic. The first method concatenated the melodic.nii.gz images from each run using fslmerge -t followed by uploading the merged file as the input for a single session ICA in melodic with aim to complete the meta-ICA. The second method involved inputting each of the different run files (melodic_IC.nii.gz, 2 for simplicity sake of a trial run) and letting melodic temporally concatenate and complete the analysis as a single session ICA (I did not think this was the best method but thought I should at least try it).
Currently, the analysis using both methods are stuck at the same place on our servers. Specifically at this point in the registration sequence
/opt/bliss/fsl/bin/slicer example_func2standard standard -s 2 -x 0.35 sla.png -x 0.45 slb.png -x 0.55 slc.png -x 0.65 sld.png -y 0.35 sle.png -y 0.45 slf.png -y 0.55 slg.png -y 0.65 slh.png -z 0.35 sli.png -z 0.45 slj.png -z 0.55 slk.png -z 0.65 sll.png ; /opt/bliss/fsl/bin/pngappend sla.png + slb.png + slc.png + sld.png + sle.png + slf.png + slg.png + slh.png + sli.png + slj.png + slk.png + sll.png example_func2standard1.png ; /opt/bliss/fsl/bin/slicer standard example_func2standard -s 2 -x 0.35 sla.png -x 0.45 slb.png -x 0.55 slc.png -x 0.65 sld.png -y 0.35 sle.png -y 0.45 slf.png -y 0.55 slg.png -y 0.65 slh.png -z 0.35 sli.png -z 0.45 slj.png -z 0.55 slk.png -z 0.65 sll.png ; /opt/bliss/fsl/bin/pngappend sla.png + slb.png + slc.png + sld.png + sle.png + slf.png + slg.png + slh.png + sli.png + slj.png + slk.png + sll.png example_func2standard2.png ; /opt/bliss/fsl/bin/pngappend example_func2standard1.png - example_func2standard2.png example_func2standard.png; /bin/rm -f sl?.png
Both methods have been "stuck" at this point for 2 days now, and considering the amount of data included in the analysis is not large (5 subjects per run X 2 runs), I am not hopeful the analyses will progress any further.
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