[Camino-users] Spatially varying sigma

[Slater David]

Hi,

If you want to account for this I think you could just scale your raw DWI data if you have a noise map in the same space.

Perform the DWI distortion correction then divide the DWIs by the non-uniform noise std-map. In this way signal is scaled to match noise across the image and you can just give a noise std of 1 to camino (assuming your noise map was the std in each voxel).

Might need a little testing but it should work.

Best,
David


-----Message d'origine-----
De : camino-users-bounces at www.nitrc.org [mailto:camino-users-bounces at www.nitrc.org] De la part de djpeters at u.washington.edu
Envoyé : 21 April 2015 19:24
À : camino-users at public.nitrc.org
Objet : [Camino-users] Spatially varying sigma

Hello camino users,

    Is there any way to give RESTORE an image of sigma values, to take into account the spatially varying noise level due to parallel acquisition (i.e. 
more noisy in the middle, less on the sides).

Thanks,
-Dan Peterson




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