If I understand your question, you want to be able to specify a bounding box for generating images spatially normalised to 1 mm isotropic resolution. The bounding box is in units of mm, and specifies coordinates within MNI space that define the corners of your normalised images. I think you just need to change the voxel sizes for the normalised images to [1 1 1] instead of their current default values. Best regards, -John ________________________________ From: SPM (Statistical Parametric Mapping) <[log in to unmask]> on behalf of ELENA GROSSO <[log in to unmask]> Sent: 06 March 2024 15:02 To: [log in to unmask] <[log in to unmask]> Subject: [SPM] SPM registration to MNI152 1 mm ⚠ Caution: External sender Hi all, Have you ever registered maps with 1x1x1 mm3 resolution in MNI space with SPM? I can' t find anywhere the bounding box to do it! Thanks, Elena