get_gx_gy

Self calibrating GROG GRAPPA kernels.

Based on the MATLAB implementation found here: https://github.com/edibella/Reconstruction/blob/master/%2BGROG/get_Gx_Gy.m

mr_utils.gridding.scgrog.get_gx_gy.get_gx_gy(kspace, traj=None, kxs=None, kys=None, cartdims=None)

Compute Self Calibrating GRAPPA Gx and Gy operators.

Parameters:

• kspace (array_like) – kspace samples.
• traj (array_like) – k-space trajectory.
• kxs (array_like) – kx coordinates.
• kys (array_like) – ky coordinates.
• cartdims (tuple) – Expected dimensions of cartesian grid.

Returns:

• Gx (array_like) – GRAPPA kernel in x
• Gy (array_like) – GRAPPA kernel in y