Dear all
I preprocess the ABIDE dataset with spm12, this dataset consists of rest fMRI with one session for each subject and most of the data have less than 200 scans.
The procedure that I use for preprocessing data is:
1.segmentation of the anatomical image
2.skull-stripped
3.normalise anatomical image
4.discarding first 5 scans of functional image
5.slice timing
6.realignment to first functional scan
7.coregisteration:
-Reference image: skull stripped anatomical image
-Source image: mean functional image
-Other images: realignment functional image
8.normalise functional image to MNI space
9.smoothing with using 6mm FWHM
First: I want to know after these steps how can I figure out which data must be deleted and after that, I will continue to process the data, for example, extract WM time series?
Second: when I extract WM (7mm ROI) or CSF (5mm ROI) time series for some subjects I receive a warning (empty region), you think the reason for this depends on data or have another reason? (I didn't remove any data after preprocessing)
Best regards,
soroor
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