mrpro.data.traj_calculators.KTrajectoryIsmrmrd

class mrpro.data.traj_calculators.KTrajectoryIsmrmrd[source]

Bases: object

Get trajectory in ISMRMRD raw data file.

Use an instance of this class to tell mrpro.data.KData.from_file to read in the trajectory from the ISMRMRD file [TRA].

The trajectory is optionally normalized to fit in the encoding matrix.

References

[TRA]

ISMRMRD trajectory https://ismrmrd.readthedocs.io/en/latest/mrd_raw_data.html#k-space-trajectory

__init__(normalize: bool = False) → None[source]

Initialize KTrajectoryIsmrmrd.

The ISMRMRD specification deos not define a normalization for the trajectory. If the trajectory is not normalized to the encoding_matrix, please set normalize=True `to enable normalization. Otherwise, the trajectory is read in as-is.

Parameters:

normalize (bool, default: False) – normalize the trajectory to the encoding matrix.

__call__(acquisitions: Sequence[Acquisition], encoding_matrix: SpatialDimension) → KTrajectory[source]

Read out the trajectory from the ISMRMRD data file.

Parameters:

• acquisitions (Sequence[Acquisition]) – list of ismrmrd acquisistions to read from. Needs at least one acquisition.

• encoding_matrix (SpatialDimension) – encoding matrix, used to normalize the trajectory.

Returns:

trajectory in the shape of the original raw data.

__eq__(value, /)

Return self==value.

__new__(**kwargs)