metric profile direction

[MengxingLiu]

Repeating two identical computations of one tract, the resulted FA profile has the chance of being flipped, so the correlation of the two profiles are -0.9. After flipping it back, the correlation is +0.9.

[smeisler]

Hi, you might find https://dipy.org/documentation/1.4.1./reference/dipy.tracking/#orient-by-streamline or https://dipy.org/documentation/1.4.1./reference/dipy.tracking/#orient-by-roi helpful for this. Essentially, you would make sure each streamline (or set of streamlines) are aligned to the same start/end point before making profiles.

Best,
Steven