[feature] add subspace projection model.

mind-inria / mri-nufft

Doing non-Cartesian MR Imaging has never been so easy.

https://mind-inria.github.io/mri-nufft/

BSD 3-Clause "New" or "Revised" License

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[feature] add subspace projection model. #201

Closed mcencini closed 1 month ago

mcencini commented 1 month ago

This PR add a new extension to enable low rank subspace projected NUFFT as described (in a Cartesian context) here. A non-exhaustive list potential applications is:

Multi-contrast MRI with virtual echoes (e.g., Tamir et al.)
Acceleration of iterative reconstruction for quantitative MRI (e.g., Magnetic Resonance Fingerprinting, MR Multitasking)
Dynamic (e.g., cardiac) MRI

mcencini commented 1 month ago

I am not sure why tests would fail for gpunufft density compensation - I did not touch anything from that subpackage

paquiteau commented 1 month ago

The CI is just a bit flaky it seems.