Hello,
We have a question regarding dual regression in ICA analysis. After running group ICA, we inputted the melodic_IC file (the group analysis for each component in a single image file) with the preprocessed functional images (_filt_func_data) into dual_regression but we couldn't get any result. We had to register the melodic_IC file to a preprocessed functional image to get stage 2 and stage 3 results. We are wondering whether getting no results initially means that there is something fundamentally wrong in how we did the analysis or whether it's common practice to register the melodic_IC image file onto a preprocessed functional image before running dual_regression. As background information, to get the melodic_IC file we ran group ICA while implementing registration of the functional files onto structural files and then to the MNI standard (using the melodic GUI). The registration results looked acceptable.
Thanks in advance,
Helen Sawaya
George Chahine
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