White matter mask

Providing a white matter mask is a useful step to accelerate microstructural features computation and more easily do tractography. The white_mask function of the ElikoPy library has been elaborated to perform this important step.

T1 preprocessing pipeline.

When a T1 image is available, it is preprocessed then segmented. Finally the segmented white matter mask is projected into the space of the preprocessed diffusion image.

On the other hand, when no T1 images are available, the white matter mask is directly computed from a segmentation of the diffusion data using Anisotropic Power (AP) map. In this case, no registrations are necessary.

AP map is shown in the left panels, while a T1 weighted structural image obtained from the same subject is shown in the right panel.