Multiband, multishot magnetic resonance elastography
AssigneeThe Board of Trustees of the University of Illinois
InventorsCurtis L. Johnson, Bradley P. Sutton, Joseph L. Holtrop
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Abstract
A method and system provides an acquisition scheme for generating magnetic resonance elastography displacement data with whole-sample coverage, high spatial resolution, and adequate SNR in a short scan time. The method and system can acquire in-plane and through-plane k-space shots over a volume of a sample divided into a plurality of slabs that each include a plurality of non-adjacent slices to obtain three dimensional multiband, multishot data, can apply multiband radio frequency refocusing pulses to the sample, can acquire navigators before readout, and can correct for non-linear motion errors.
Claims20
A method of magnetic resonance elastography, the method comprising:
- acquiring, by a system including a processor, a blipped, spiral-in three dimensional navigator data from a sample divided into a plurality of slabs that each include a plurality of non-adjacent slices;
- providing, by the system, a gradient blip normal to the non-adjacent slices to define a sample plane;
- acquiring, by the system, in-plane k-space data after the gradient blip is provided;
- and
- repeating the acquiring of the in-plane k-space data over the plurality of slabs to obtain three dimensional multiband, multishot data.
A system comprising:
- an actuator for applying a vibration to a sample;
- a magnetic resonance system for facilitating applying magnetic resonance elastography to the sample;
- a processor coupled with the actuator and the magnetic resonance system;
- and
- a memory that stores executable instructions which, responsive to being executed by the processor, facilitate performance of operations, comprising:
- acquiring a blipped, spiral-in three dimensional navigator data from a sample divided into a plurality of slabs, wherein each slab of the plurality of slabs comprises a plurality of non-adjacent slices;
- providing a gradient blip to define a sample plane;
- acquiring in-plane k-space data after the gradient blip is provided;
- and
- repeating the acquiring of the in-plane k-space data over the plurality of slabs to obtain three dimensional multiband, multishot data.
A computer-readable storage device comprising computer instructions which, responsive to being executed by a processor, facilitate performance of operations, comprising:
- acquiring a blipped, spiral-in three dimensional navigator data from a sample divided into a plurality of slabs that each include a plurality of non-adjacent slices;
- providing an encoded gradient blip to define a sample plane;
- acquiring an in-plane k-space shot comprising the plurality of non-adjacent slices;
- and
- repeating the acquiring of the spiral-in three dimensional navigator data and the in-plane k-space shot over the plurality of slabs of the sample to obtain three dimensional multiband, multishot data.
Dependencies are inferred from the claim text.