Dear Marta,
> I tried to convert dicom images, acquired from 1.5T GE CVi/NVi, to NIfTI. This device allows only acquire 999 images at a time, but the complete sequence have 3640 images. So, software put each group of images in different folders, such as "RTIP_6" and "RTIP_26".
>
> I tried to convert and merge all images using dcm2nii and MRIConvert, but this softwares shows me one file .nii for each folder. Then, I tried to merge all files .nii obtained using fslmerge but the command shows me this warning:
>
> Error in size-match along non-concatenated dimension.
If you have run fslmerge correctly this would imply that you have different image sizes for the different "sub series", which sounds very strange. If that is the case you should look into the reason for that.
Can you send us the exact fslmerge command you used?
Jesper
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