bartorch.tools.traj

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bartorch.tools.traj#

bartorch.tools.traj(*, readout=None, spokes=None, frames=None, radial=False, golden=False, turns=None, oversampling=False, **extra)#

A k-space trajectory, in grid units.

Parameters:

  • readout (int, optional) – Samples along a readout (-x).

  • spokes (int, optional) – Readouts per frame (-y).

  • frames (int, optional) – Frames (-t).

  • radial (bool) – A radial trajectory rather than Cartesian (-r).

  • golden (bool) – Golden-angle spacing between spokes (-G).

  • turns (int, optional) – Turns, for a multi-shot trajectory (-m).

  • oversampling (bool) – Two-fold readout oversampling (-o takes a factor; this is -O).

  • **extra – Further BART traj flags, by name.

Returns:

Coordinates of shape (..., samples, 3), which every non-Cartesian transform in this package takes.

Return type:

torch.Tensor

Examples

>>> trajectory = traj(readout=256, spokes=64, radial=True, golden=True)
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