> I'm new to SPM and have started using SPM2. I'm having problem when I do
> the following:
> 1. Normalize T1,T2,PD images to the templates given in SPM
> 2. This will result in the image having max value of 32767 and min value -
> 32768.
> 3. So I calculated the actual maximum and minimum value of the normalized
> images(using Analyze) and changed it in the header and then did the
> segmentation using T1,T2 and PD
> 4. It gave me awful results but at the same time if I skip changing the
> maximum and minimum value the segmentation works fine.
>
> Can someone tell me what's going on here!
Are you using SPM2? You probably also need to change the cal_max and cal_min
fields to match the changes you make to glmax and glmin.
% * Scalefactors and dc-offset are derived from hdr.dime.funused1
% hdr.dime.funused2 respectively (if funused1~=0 & finite(funused1)).
% If hdr.dime.funused1 is zero or non-finite then they are derived
% from hdr.dime.cal_max, hdr.dime.cal_min, hdr.dime.glmax and
% hdr.dime.glmin.
Best regards,
-John
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