The 'm*.img' is a bias corrected version of the original image.
Best regards,
-John
On Friday 12 August 2005 22:25, Yong Zhang wrote:
> Dear SPMers,
>
> Currently I am working on a VBM project using SPM5b.
> I did the normalization and segmentation steps separately.
> After normalization, I got a filename_sn.mat file, which should
> save the deformation parameters. Then I continued to segment
> the warped image. When I chose to segment in the native
> space (because the image was already warped), I got c1,c2
> and c3 segments plus an image with the same name except for
> a leading "m". I am wondering if this is the modulated
> image and if so, where were the modulation parameters
> derived?
> from the filename_sn.mat? I think John ever said
> that modulation should be applied after segmentation and to
> those segments. I don't know why modulated the warped
> image, not the segments.
>
> I also tried the unmodulated and modulated normalised options
> during the segment step because I wanted to obtain
> the modulated segments. But I am not sure if I did it right
> since I already warped my image. When I chose normalization
> during the segmentation, I got two mat files named filename_seg_sn
> and filename_seg_inv_sn respectively. I guess in this situation,
> the modulation parameters will be calculated using the
> filename_seg_sn instead of the filename_sn file. Am I right?
> If I still want to use the filename_sn file to modulate the
> segments, what should I do?
>
> Sorry for so many questions and thanks for your help in advance!
>
> Sincerely,
>
> Yong
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