tfmri.signal.crop_kspace

crop_kspace(kspace, trajectory=None, cutoff=None, mode='low_pass')[source]

Crop k-space.

Crops all frequencies above or below the specified frequency.

Parameters

  • kspace – A Tensor of any shape. The input k-space.

  • trajectory – A Tensor of shape kspace.shape + [N], where N is the number of spatial dimensions.

  • cutoff – A float between -pi and pi. The cutoff frequency.

  • mode – A str. Must be one of low_pass or high_pass.

Returns

A Tensor. The cropped k-space.