Hi!
So I have two identical dMRI scans in opposing directions (AP/PA).
I concatenate and run eddy (with Jacobian interpolation to keep the output concatenated), then I run eddy_quad, and my SNR/CNR are 17.55/0.90.
I run eddy on each one individually, and my eddy_quad SNR/CNR for each scan is much higher compared to the concatenated version:
AP scan SNR/CNR: 24.76/1.38
PA scan SNR/CNR: 22.44/1.40
I would expect the concatenated version would give me SNR/CNR that would be roughly average of those two, but it's lower.
Can someone make sense of that?
Here are the 3 eddy_quad reports if anyone is interested in taking a look:
https://www.dropbox.com/s/8h5eb23ybohpr9u/EddyQuad-comparison.zip?dl=0
Thanks!
Mark
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