So you guys agree with Bas that in SPM8 I do not have to set the origin
manually to ac anymore?
Btw: I am talking about PET data.
On 17.02.2012 16:31, John Ashburner wrote:
>> For fMRI data, SPM8 still relies on the *.mat files. The reason for
>> this is
>> that the nifti file can only have 1 transformation matrix in it (I
>> this about a month ago). If you remove the *.mat files from a
>> directory and
>> display the images, you will notice that they shift. The classic
>> example is
>> motion correction. After you motion correct the data, you have a mat
>> If you remove the mat file, you undo the motion correction.
> This only applies to 4D NIfTI files. If the fMRI are a series of 3D
> volumes, then there should be no .mat files.
> When using old ANALYZE format images, there is always the chance of
> some left-right confusion about image orientations. It may be an idea
> to check the files using the spm_orientations function. This will
> show you where SPM considers the first voxel in the image to be. Of
> course, you would need to know the true orientations in order to say
> whether SPM is treating the orientations correctly.
> Best regards,