open-discussion > DWMRI gradient mismatch
Apr 1, 2021  01:04 PM | ritagv
DWMRI gradient mismatch
Dear DTIPrep experts,

I am running DTIPrep on multi-shell diffusion data.

I am having very strange values in the diffusion bcheck step for every gradient:

DWMRI_gradient_0001 mismatch!
DWI: [ -0x1.84ca3b8c8efc9p-5 0x1.0b17b1aa502d8p-1 0x1.b422f64036d8ep-1 ]
protocol: [ -0x1.f1688d1f2f156p-5 0x1.97a41e01e39a7p-2 0x1.d4a6eb2ee00d5p-1 ]
Colinearity angle (degrees): 0x1.001bffb706bdcp+3 > 0x1p+0

Do you have some advice on things we should check? Or do you think it is safe to ignore these warnings based on the answer to a previous topic titled "DTIPrep on multi-shell data + DWMRI gradient mismatch error".

I am sending you the QCReport file attached.

Thanks in advance for your help!

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TitleAuthorDate
DWMRI gradient mismatch
ritagv Apr 1, 2021
Martin Styner Apr 26, 2021