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The goal of the code (and the expanded code available at http://brainmap.wisc.edu/normalizeDARTELtoMNI) is to make the brain the same WITHOUT resampling the voxels. The idea behind this is that each resampling that is done will smooth your data and the only way to avoid resampling the data is maintain the same voxel size. If you 2x2x2 voxels, then you can use normalize --> write and resample the voxels that way. Additionally, SPM8 has a method to go directly to MNI space -- I don't recall if you can control the voxel size on the output there or not though; however, this only works for high resolution data as low resolution (e.g. fMRI, some older DTI sequences) data introduces alaising into the solution. Hope this helps. Best Regards, Donald McLaren ================= D.G. McLaren University of Wisconsin - Madison Neuroscience Training Program Office: (608) 520-0586 ===================== This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is intended only for the use of the individual or entity named above. If the reader of the e-mail is not the intended recipient or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that you are in possession of confidential and privileged information. Any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited and may be unlawful. If you have received this e-mail unintentionally, please immediately notify the sender via telephone at (608) 520-0586 or email. On Tue, Jan 26, 2010 at 11:48 AM, Alireza Salamy <[log in to unmask]>wrote: > > > Dear John , > > I have been using your code (attached) to normalize all subjects from Dartel > space to MNI, but it seems that it changes the voxel size. My impression > was that the code by default was suppose to take the voxel size of the apriori/grey.nii > which was used to calculate the affine transformation, but actually this is > not so. I couldn't find the section in the code that one would be able to > set the voxel size (2*2*2 would be preferable for my case)? > > Any help would be appreciated! > /Alireza > > > >