Hi, <div><br></div><div>I have bias-corrected and co-registered longitudinal images, and I&#39;m interested to use Freesurfer to construct unbiased within-subject templates (to be used in SPM). Using mri_roubust_template, I get the following error message on some (not all) of the subjects. I was wondering whether I could use options/flags to avoid this. </div>
<div><br></div><div>--------------------------------------------------------</div><div><div>ERROR: All entries are zero! Images do not overlap (anymore?).</div><div>    This can have several reasons (i.e. different modalities, different </div>
<div>    intensity scales, large non-linearities, too diff. voxel sizes ...)</div><div>    Maybe use --transform &lt;init.lta&gt; with an approx. alignment</div><div>    obtained from tkregister or another registration program.</div>
<div>    Or do some prior intensity correction? </div></div><div>--------------------------------------------------------</div><div><br></div><div>All the best,</div><div>Arman</div>