Hi Brad
number of defects is probably a pretty unstable measure. You can change
the segmentation of a single WM voxel and cause a defect to
appear/disappear. You can also have differences in scan quality due to
e.g. motion that can change things. Are the scan visually of different
CNR?
cheers
Bruce
On Fri, 24 Mar 2017, Brad Matushewski wrote:
We have a study where subjects are scanned one, and a second time 6 months
later. I am looking for changes between the two time point and often times
there is a large difference in the “number of defect holes prior to fixing”
within the same subject.
Can anyone comment on the significance of this? Given the same brain being
scanned 6 months later, how / why is there such a difference?
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Brad J. Matushewski, M.Sc., R.Kin., CSEP-CEP.
Laboratory for Brain & Heart Health
School of Kinesiology
Western University
Room 402, Arthur & Sonia Labatt Health Sciences Building
London, ON, Canada, N6A 5B9
Tel: (519) 661-2111 x 89066
Fax: (519) 850-2447
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