[Mrtrix-discussion] best parameter with a long-time scan?

[romain quentin]

Dear experts, 
I'm using CSD from mrtrix with a diffusion sequence with b = 1500, 32 channels coil, 60 directions and isotropic 1.7mm voxels. This sequence takes about 15 minutes.
I want to acquire a better diffusion sequence with more scanning time (around 1 hour). I think to use b value = 3000 but i'm not sure about the voxel size and numbers of directions.
Do you think it's better to do 4 x 60 directions, 2 x 120 or around 200 directions of diffusions?
And I know that reduces the voxel size is risky for the SNR but do you think that I can keep a 1.7 isotropic regard to the time scanning (1 hour)?
Thank you very much for your help.
Best regards, 

Romain QUENTIN
rom.quentin at gmail.com
01 42 16 00 67
06 80 33 15 74