Matteo Cencini issues

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                                            Matteo Cencini

Enhance Fourier Corrected operator

Hi all, thanks again for this package! This PR partially address #124. Specifically, I added a `get_interpolators_from_fieldmap` (supporting complex R2* + 1i * B0 fields) and modified the MRIFourierCorrected constructor...

# MRI-NUFFT fails to detect available backends

Hi all, thanks for this awesome package! I have noticed that the package seems to fail to correctly detect available backends. In my case, I only installed torchkbnufft backend, but...

[feature] add subspace projection model.

This PR add a new extension to enable low rank subspace projected NUFFT as described (in a Cartesian context) [here](https://onlinelibrary.wiley.com/doi/10.1002/mrm.26102). A non-exhaustive list potential applications is: - Multi-contrast MRI with...