Dear SPM experts,
I want to normalize my EPI data into standard MNI152 space using "New Segment" tool. After segmentation, I get "y_*.nii" which I use as an input for "Deformations" tool in "Composition: Deformation field". To define a target space, I must also define either (a) "Identity (Reference image)" OR (b) "Identity (Bounding Box and Voxel Size)". For MNI152, I would then use (a) the bounding box [-90,-126,-72;90,90,108] and the voxel size [2,2,2], or (b) a reference image "MNI152_T1_2mm_brain.nii". However, the warped image is not the same for (a) and (b). For (a), the warped volume dimensions are incorrectly [90,108,90], while it is correctly [91,109,91] for the latter one. Am I doing something wrong or is this simply a bug in SPM8?
PS. With SPM12b, the corresponding warping works fine (i.e. volume dimensions are [91,109,91]) with both "Normalize:Write" and "Deformations" modules when using the above bounding box and the voxel size.
Best regards,
Janne Kauttonen
|