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I've been looking at some DTI data for one of my colleagues. It appears as though different TRs were used (e.g. 6125, 6500, 7100, 8374) across subjects. Is this a huge problem for my colleague? What are the effects of different TRs on DTI metrics like FA and MD? While I wasn't expecting such differences in TR in my colleague's study, it's true that the published literature has everyone's favorite TR for their own study. So the same issue applies when evaluating results across studies. Any thoughts? Jenifer