Hi FSL Experts,
I am using Siena to compute PBVC for MS patients.
In the past we would see a mean -0.4% PBVC value for two scans a year apart.
Recently, our GE scanner went through a software upgrade.
I am now comparing two scans (pre- and post- upgrade) using Siena.
(These pre- and post-upgrade images are also a year apart)
Strangely for many of the subjects, the PBVC values are now positive
(which is not what we expect for these patients).
I tried Siena version 2.6 and version 2.4 and for both versions I see
positive PBVC value.
Has anyone experienced similar issues with Siena ? If so any
suggestions to overcome this issue would be very helpful.
Also any suggestions on debugging the intermediate steps would also be
very helpful.
Thank you,
Mehul
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