Sam Coveney

Results 10 issues of Sam Coveney

This bug was report [here](https://github.com/dipy/dipy/issues/2541) and concerns ndarray.min() causing coverage tests to fail (note that numpy.min(ndarray) works fine). It seems very difficult to reproduce, but in short using a command...

bug
question
exotic

The functions in dipy/align/_public, which conveniently allow to register entire dwi series, are only designed to work with 3D volumes, i.e. 4D data, in which the acquisitions are in the...

type:refactoring

DKI fitting was not allowing to save S0 so I have made some updates.

https://github.com/dipy/dipy/blob/7e158ffa52b81710f3a1b0d6afa3a364f42a650c/dipy/reconst/dki.py#L1678 I think, as mentioned in #2730, that the masking in the DKI function is not working properly except for the `multi_fit` method, because the mask does not appear to...

type:Bug Fix

Although this is perhaps a Fury question, I feel that in this case it really belongs here. The BIDS compliant NIfTI format species a left-handed coordinate system (radiological convention). The...

state: needs to check
:grey_question: type:Question :grey_question:

## Description Manjon 2013 paper "Diffusion Weighted Image Denoising Using Overcomplete Local PCA" provides a method to estimate noise in a diffusion weighted image series using PCA. I believe that...

state: needs to check
state: needs feedback

Adds ability to do iteratively re-weighted least squares for DTI and DKI (with/without positivity constraints) by defining a function to return weights based on the residuals of the last fit....

type:New feature

I am checking through some of the tests for reconst/dti, and I am finding (after some changes made for an up and coming PR) that the checks on the non-linear-least-squares...

I need some help figuring out if there is a problem with constrained WLS in the DKI module. See `dipy/reconst/dki.py` https://github.com/dipy/dipy/blob/e5cc120bf6c5c271f32cced62150157abd15a321/dipy/reconst/dki.py#L2611-L2619 So here we see that, in order to solve...

type:Bug Fix

Attempt to replace #3170 after rebasing on changes made in #3323 Probably need help from @arokem and @skoudoro on this