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The bias field correction is only done for the scan that is segmented, and I don't think it would be applicable to eg the EPI data. Best regards, -John On Fri, 2009-10-16 at 16:54 -0400, firdaus.janoos wrote: > Hello, > > In SPM there is an option to segment a high resolution > structural scan of the subject while simultaneously estimating > the bias field in the image. There is also another option to > normalize both the structural and the epi scans to an atlas > space. > > I wanted to know if during this normalize and reslice of the > epi scans if correction for the bias field is applied ? Also, > in general, would the bias field be stationary over the > duration of the study ? > > Thanks, > -firdaus > -- John Ashburner <[log in to unmask]>