Dear everyone,
Recently I've tried out a few options to register together a group of subjects based on the Dartel imported rc* files from segmentation, resliced c* files with higher spatial resolution (structural volumes had been reoriented onto an MNI template before the segmentation step anyway), or wc* files obtained from unified segmentation, which I forwarded into Dartel and Shoot. It turned out that the group average template derived with Shoot and based on the resliced c* files looked the "sharpest" overall.
In any case, I would now like to use the deformations from one of that Shoot approach. However, I'm somewhat puzzled, as I obtained deformation fields y_ and velocity fields v_ . Are there any recommendations whether to go this or that way?
In addition, as the final Shoot template is not in MNI space, I would like to rely on the "Mapping to ICBM space" option, which results in a deformation field. Are there any recommendations on how to forward these into the Deformations utility, e.g. should I combine the two deformations into a single deformation field beforehand, or should I just use the "Composition" feature?
Thank you for any hints
Helmut
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