Dear fsl users,
I used siena and sienax to analyze Alzheimer data scans (T1).
My data were carefully chosen in order to be from the same scanner and with
exactly the same characteristics.
The point is that in more than 30% of the results siena and sienax were
showing totally uncorrelated results (siena showed atrophy and sienax
showed growth) and in most of the cases not strong correlation (siena
showing big atrophy ans sienax showing small atrophy). I checked all the
stages of the siena and sienax analysis and there weren't any evidence of
problems during it.
According to Smith et al. Neuroimage 36 (2007) there is a strong correlation
between PBVC and NBV so I'm not sure if i can trust my results.Any ideas why
this happens?
I'm sending you the analysis results of some of my scans to have a better
view of what am i talking about. (ID : 575483)
Thank you
Antonios Constantine Thanellas
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