mrinufft.operators

Collection of operators applying the NUFFT used in a MRI context.

The recommended way to create a Fourier operator is to use the get_operator() function, select a NUFFT backend and provide the trajectory, shape and extras parameters. The Fourier operator can then be used to apply the forward op() or adjoint NUFFT (adj_op()), or to compute the pseudo-inverse of the operator (pinv_solver()).

Tip

All the operators abide by the same interface, and could (mostly) be used interchangeably. See MRI-NUFFT Interfaces Convention for a detailed description of the interface.

Functions

check_backend	Check if a specific backend is available.
get_operator	Return an MRI Fourier operator interface using the correct backend.
list_backends	Return a list of backend.
kspace_as_real	View k-space data as real-valued tensor.
kspace_as_cpx	View real-packed k-space tensor as complex.
image_as_real	View image tensor as real channel-packed tensor.
image_as_cpx	View real channel-packed image tensor as complex.

Classes

FourierOperatorBase	Base Fourier Operator class.
MRIFourierCorrected	Fourier Operator with B0 Inhomogeneities compensation.
MRIStackedNUFFT	Stacked NUFFT Operator for MRI.
MRISubspace	Fourier Operator with subspace projection.
MRICartesianOperator	Cartesian Operator for MRI reconstruction.
MRICufiNUFFT	MRI Transform operator, build around cufinufft.
MRIStackedNUFFTGPU	Stacked NUFFT Operator for MRI using GPU only backend.
MRIBartNUFFT	BART implementation of MRI NUFFT transform.
MRIDUCC0	MRI operator using ducc0 backend.
MRIfinufft	MRI Transform Operator using finufft.
MRIGpuNUFFT	Interface for the gpuNUFFT backend.
MRInfft	MRI operator using numpy NUDFT backend.
MRInumpy	MRI operator using numpy NUDFT backend.
MRIPynufft	PyNUFFT implementation of MRI NUFFT transform.
MRISigpyNUFFT	NUFFT using SigPy.
MRITensorflowNUFFT	MRI Transform Operator using Tensorflow NUFFT.
TorchKbNUFFTcpu	MRI Transform Operator using Torch NUFFT for CPU.
TorchKbNUFFTgpu	MRI Transform Operator using Torch NUFFT for GPU.
DeepInvPhyNufft	Expose an MRINufftAutoGrad as as DeepInv Physics Operator.