Submitted by Zealousideal-Alarm37 t3_126wuxj in askscience
Brain_Hawk t1_jeh46nf wrote
Reply to comment by Zealousideal-Alarm37 in If MRI Voxels are 1mm^3 how can MRIs identify something as thin as white matter? by Zealousideal-Alarm37
Dti does not measure axons.
It makes a model of white matter tracts based on the characteristics os the direction of diffusion. Like so many things MRI, it's a model, and an estimate of how large bundles of axons are organized and traverse through the WM.
If you wanna learn more I bet you can find some good videos on YouTube. :)
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