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Hi!
          Please resample your mask or ROI file to the dimension of your functional images in REST.
          You can use SPM to reslice your image as follows:
                                                                       a. Click "Coregister"
                                                                       b. Click "New "Coreg: Reslice""
                                                                       c. "Image Defining Space": choose one of your functional image. e.g. your normalized functional image or image after Detrend and Filter.
                                                                       d. "Images to Reslice": choose the mask file or ROI definition file. e.g. BrainMask_05_61x73x61.img
                                                                       e. "Reslice Options" -> "Interpolation": choose "Nearest neighbour"
                                                                       f. Just click "Run". Then you will get the resmapled mask or ROI file with a surfix of "r".

                   And the new release of REST is coming soon (maybe in one or two weeks), we have added this function to REST, and you can reslice the images in a batch mode.
       Best wishes!
                                                                      Yours Sincerely,
                                                                      YAN Chao-Gan
               
On Tue, Nov 17, 2009 at 12:21 AM, Ben Pruce <[log in to unmask]> wrote:
Hello,

Is there a way to re-slice an image with user defined dimensions?  I'm
using the REST toolkit extension in SPM and when I try to use my own
ROI's for whole-brain connectivity I keep getting an error that the
image is not in the correct dimensions.  It says mine is 91x109x91 and
I need to be in 79x95x69.  Do these dimensions seem odd?

Best,
--
Benjamin Pruce, R.A.
Psychological and Brain Sciences
Indiana University
Bloomington, IN 47401