Dear Mrtrix community!
I recently jumped on the diffusion MRI train and I unfortunately struggle with some of the basics.
I was under the impression that CSD modeling can/should only be performed on data with high angular resolution, such as HARDI. However, I have recently stumbled on a paper using CSD on traditional DWI data to compute track density images. The DW protocol reported is as follow
a diffusion-weighted scan that was acquired using a spin-echo echo-planar imaging sequence (Echo Time (ET) 81 ms, Repetition Time (TR) 10,050 ms, band-width 250 KHz, matrix size 128 × 128; 80 axial slices, voxel size 2.0 × 2.0 × 2.0 mm3) with 27 isotropically distributed orientations for the diffusion-sensitizing gradients at a b-value of 1,000 s/mm2
I’m assuming that the CSD model will be unable to estimate the FOD accurately, but is it actually wrong to use CSD on this type of data?
Are there specific considerations/suggestions to take into account in this scenario, e.g. this post?