We have been having problems with the longitudinal VBM8 routine in many of our subjects. The segmentation of many of the individuals does not appear to work as seen in the attached figure. However, the cross sectional VBM preprocessing does produce a satisfactory segmentation (also attached). We have tried to go through the longitudinal VBM8 procedure step by step looking at the results of each module. We have repositioned the baseline and follow-up image so that they were closer to the template. We still cannot figure out exactly why the procedure fails and how to fix it. Has anybody experienced this problem before? Does anybody have a suggestion for us to try?
Thank you!
Hillary Protas
The figure order is as follows:
* vbm8 longitudinal GUI
Template
wmrmean (mean image)
bsl
m12
bsl-wp1mr(warped grey matter)
bsl-wp2mr(warped white matter)
m12-wp1mr(warped grey matter)
m12-wp2mr(warped white matter)
*bsl cross-sectional vbm8
Template
bsl
bsl-p1(grey matter)
bsl-p2(white matter)
bsl-wrp1(warped grey matter)
bsl-wrp2(warped white matter)
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