Hello, I am finding differences in hippocampus voulme of same subject when scanned at different times . Our study requires our subjects to be scanned 3-4 times (T0-T3) within a period of 1 month. We have performed MRI Scanning on all our subjects with same sequence using 3T GE scanner. Please suggest the reason behind this difference and how would I go about correcting it. For example following are the hippocampal values for two subjects ( A and AA ) calculated by freesurfer from different scans. Surprisingly for these two subjects T3 and T2 Hipp-values for A and AA respectively that are differing from the other timepoints are same.
Left-Hippocampus Right-Hippocampus A.T0 3537 3632 A.T1 3629 3796 A.T2 3536 3782 A.T3 3096 3671 AA.T1 4245 4667 AA.T2 3096 3671 AA.T3 4341 4491
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