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Dear Jerome, I think that depends on the kind of the analysis and the kind of scanners. For instance I wouldn't put scalp maps from CTF axial gradiometers and Neuromag magnetometers in the same scalp-level analysis but I think it's OK to put MSP source images from different scanners together because they are normalized. Also as done in fMRI you might model the effect of scanner by a separate regressor and also not assume equal variance for different subjects. Best, Vladimir On Thu, Jan 12, 2012 at 4:17 PM, Jerome Courtemanche <[log in to unmask]> wrote: > Hi, > > Is it possible to use data collected by different MEG scanners into one single analysis? > > Best wishes, > > Jerome