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mapfit_laplacian_aniso (high non-Gaussianity, NG values in CSF) #1321
I used ‘mapfit_laplacian_aniso’ to extract MAP-MRI indices on HCP data. NG index should have small values in CSF compared to the WM. However, in my results CSF is not dark in NG map. Would you please help me to solve this problem?
Hi Maryam, this can be proably due to the fact that the ventricles usually are more noisy with respect to the rest of the tissues. Try to:
What are your b-values? Consider also that after b=1000 the CSF signal basically disappears and only noise is left for MAPMRI to fit. Try to denoise your data a bit and see if the NG reduces after that.