Dear experts,
I have a DTI dataset of 73 subjects with some variability in the sequence parameters:
Repetition time: 19 subjects were given a TR of 15000 while the rest got a TR of 17000.
Echo time: most of subjects got a TE around 72, but there are some ranging from 73 to 87. Even there is one with a TE of 96 and another one with 107.
I wonder if it is possible to combine them for TBSS analyses. In case it is, should I enter TR subgroup as covariate or is it not necessary? What about the TE?
Thanks so much and happy 2014!
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Daniel Ferreira, PhD.
Department of Neurobiology, Care Sciences and Society, Division of Clinical Geriatrics (Karolinska Institute, Sweden)
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