TORTOISE MAP-MRI tractography in QSIRecon

Software Support
1

Dear QSIrecon developers,

I was recently advised, that QSIrecon has just implemented a tractography workflow based on MAP-MRI from TORTOISE (see the post Tractography on MAP-MRI? - #2 by irfanoglumo - TORTOISE Message Board - AFNI Discuss Message Board).

I would like to ask when you are planning to release this functionality. Also does the workflow allow the use of voxel-wise b-matrices (from TORTOISE’s gradient non-linearity correction)?

I’m asking as we will be installing a new MRI scanner with very strong gradients (Cima.X) for a research project. In this project we are thinking about using QSIprep and QSIrecon to construct structural connectomes for a very large population dataset (several thousand patients).

Thank you very much in advance.

Best regards

Samuel

2

Hi Samuel, we don’t have tractography based on mapmri yet but recently figured out how to compute ODFs based on the TORTOISE MAPMRI coefficients. We’re hoping to add this to DIPY.

The voxelwise b-matrices and gradient distortion correction features are high on the list for this year, but I don’t have a good estimate of when those will be ready. It sounds like a possible way forward would be to preprocess the data in tortoise and do the tractography in DIPY?

3

Hi Matt,

thank you for the reply. The pathway you suggested is a viable option.

We are looking forward to having gradient distortion correction in QSIPrep / QSIRecon. It will be a great addition to the capabilities of the software :slight_smile:

Best regards

Samuel