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brainlife / app-testflip

This app will quickly check the dwi image to see if any bvecs directions needs to be flipped. The algorithm finds bvecs that are pointing toward certain direction and find the volume slice within 4D DWI data and see how many image slices indeed seems to contain features that are orthogonal to the bvecs directions. Inconclusive output from this App usually means you have some data quality issue with your dwi.
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Detect tils before determining which bvecs to use #2

Open soichih opened 6 years ago

soichih commented 6 years ago

Right now, I am using static directions for bvecs to use for flip detection. Some times Brains are not perfectly aligned to X/Y/Z axis which I believe skew result (like ABIDE2 28854). If there is a quick way to detect the tilts on all 3 axis, I can use a better set of bvecs to test with.

soichih commented 6 years ago

I've added register.sh which registers the input dwi.nii.gz to MNI by first computing FA and registering the FA to the FSL MNI standard template. This should eliminate the issue of dwi.nii.gz tilted.