Hi everyone, <br><br>I am trying to reconstruct ODF estimates, based on the results of the CSD computation. For example, if I follow the instructions given in the online docs for preprocessing DWI data and end up with a file named CSD10.mif. After converting this file to .nii format and examining it, I found that it had a last dimension of size 66, which corresponds to the number of parameters required to estimate the CSD weights up to harmonic order of 10. So, I assumed that the 66 values in each voxel in the resulting file were the estimated coefficients into the set of spherical harmonics used in this case. Is that correct? If that is correct, as I understand it, all I would have to in order to reconstruct an odf estimate for a given voxel would then be to calculate the inner product between the coefficients and the spherical harmonics basis set (sampled at an array of points on the sphere). However, I would need to know which coefficient corresponds to which spherical harmonic function. Is that documented somewhere? Or could you tell me how these are organized? I have been assuming that they are organized by harmonic order (0,2,4...) and then by degree or phase factor (e.g. for order 2: -2,-1,0,1...), but I haven't been able to verify this by looking at the source-code (I am not really sure where to look). <br>
<br>Thanks, <br><br>Ariel<br>