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Hi expert,
I selected hippocampus and amygdala as ROIs to estimated the reliability of a
well-controlled multi-site study. The travelling volunteers were scanned in
each site with the same type scanners and scan protocol. But, amygdala volume
(generated by FreeSurfer) presented a relatively poor ICC scores between sites.
So, i want to found the reasons from sites or scanners. According to previous
studies, the variation might come from across-site difference and the structure
itself. And the major sources of between-site variation might be related to
field inhomogeneity and other issues idiosyncratic to individual each scanners.
Due to this reason, i want to check my data to confirm the field inhomogeneity
located in amydala area or not. How can i get the difference between the
originate image and the images after motion and NU intensity?
I am looking forward to your suggests.
Cheers,
Jiachen
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