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Dear Huiling,

> Hello,when I tried to run the following command:
> 
> eddy_openmp --imain=data --mask=my_hifi_b0_brain_mask --acqp=acqparams.txt --index=index.txt --bvecs=bvecs --bvals=bvals --topup=my_topup_results --niter=8 --fwhm=10,8,4,2,0,0,0,0 --repol --cnr_maps --out=eddy_corrected_data --mporder=6 --slspec=my_slspec.txt --s2v_niter=5 --s2v_lambda=1 --s2v_interp=trilinear
> 
> Then, the prompt "EddyInputError:  Slice-to-vol is not yet implemented for the CPU version" appeared. 
> 
> My CPU version is "8  Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz"
> 
> So, would you like to tell me how to solve this problem? Change a computer?

well, yes. The slice-to-volume was initially only implemented for Nvidia GPUs. The reason for that was that I considered it to slow to run meaningfully on a CPU. This is still true, though I am currently working on a CPU version that I hope will be fast enough to be meaningfully useful.

So your best bet is to find a Linux machine with an Nvidia GPU set up. They are becoming increasingly common, with people using them for deep learning. So I suspect it will not be impossible to find.

But also be aware that it is really quite a small subset of diffusion data that benefit from it. It tends to be mainly babies/children that move sufficiently for slice-to-vol to make a difference.

Jesper
 
> 
> 
> Thanks!
> 
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