Methods and systems for sampling k-space data in magnetic resonance imaging
AssigneeGeneral Electric Company
InventorsLisha Nie, Yongchuan Lai, Xuan Liu
Life of this patent
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Abstract
Various methods and systems are provided for acquiring k-space data for magnetic resonance imaging. In one example, after applying a phase encoding gradient, the k-space data of a phase angle is acquired while applying a frequency encoding gradient. An amplitude of the phase encoding gradient and a duration of the phase encoding gradient determined based on each and every of a phase angle of the phase encoding line and a duration of the frequency encoding gradient.
Claims20
A method for magnetic resonance imaging (MRI), comprising:
- applying a phase encoding gradient corresponding to a phase encoding line in a circular Cartesian k-space, wherein an amplitude and a duration of the phase encoding gradient vary with a position of the phase encoding line in the circular Cartesian k-space;
- and
- acquiring k-space data along the phase encoding line in the circular Cartesian k-space by applying a frequency encoding gradient, wherein a duration of the acquiring k-space data varies with the position of the phase encoding line in the k-space.
A magnetic resonance imaging (MRI) apparatus, comprising:
- a frequency gradient coil;
- a phase gradient coil;
- a controller unit coupled to the frequency gradient coil and the phase gradient coil;
- and
- a memory storing executable instructions that, when executed, cause the controller unit to:
- apply a phase encoding gradient corresponding to a phase encoding line in a circular Cartesian k-space via the phase gradient coil, wherein an amplitude and a duration of the phase encoding gradient vary with a position of the phase encoding line in the circular Cartesian k-space;
- and
- acquire k-space data along the phase encoding line in the circular Cartesian k-space by applying a frequency encoding gradient via the frequency gradient coil, wherein a duration of the acquiring k-space data varies with the position of the phase encoding line in the k-space.
A non-transitory computer-readable medium comprising instructions that, when executed, cause a processor to:
- apply a phase encoding gradient corresponding to a phase encoding line in a circular Cartesian k-space, wherein an amplitude and a duration of the phase encoding gradient vary with a position of the phase encoding line in the circular Cartesian k-space;
- and
- acquire k-space data along the phase encoding line in the circular Cartesian k-space by applying a frequency encoding gradient, wherein a duration of the acquiring k-space data varies with the position of the phase encoding line in the k-space.
Dependencies are inferred from the claim text.