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Hi, As it says in the fast documentation (for fast4) and in the help message, --nobias does what you want. All the best, Mark On 13 Nov 2008, at 08:00, Lucas Eggert wrote: > Dear List, > > I am new to FSL and have the following question: > > At the moment I try to evaluate different software packages for the > segmentation of T1-images. To get a valid comparison between > methods, it > would be necessary for me to use only the segmentation algorithm, > especially > without the correction for intensity non-uniformities - this step I > would > like to do separately to test, what effect bias correction actually > has. > > So, here now my question: Is there a way to switch off bias > correction in > FAST, maybe by applying a very large bias field smoothing, e.g. > 150mm FWHM? > > Thank you very much for your help! > > Best regards, > -Lucas Eggert >