Magnetic resonance imaging with high spatial and temporal resolution
AssigneeThe Regents of the University of California
InventorJiang Du
Life of this patent
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Abstract
Methods, systems, and apparatus for magnetic resonance imaging (MRI) are described. In one example, the method includes applying a sample-selective magnetic field gradient sequence along a slice direction to partition responses from a sample under magnetic resonance imaging into a plurality of different regions of slices in the k space, applying spiral readout gradients to the sample to obtain echo data from the sample, and applying a Time Resolved Imaging of Contrast Kinetics imaging technique to sample the different regions of slices in the k space.
Claims12
A method for magnetic resonance imaging (MRI), comprising:
- applying a magnetic field gradient sequence along a slice direction to partition responses from a sample under magnetic resonance imaging into a plurality of different regions of slices in k-space;
- applying spiral readout gradients to the sample to obtain echo data from the sample;
- applying a Time Resolved Imaging of Contrast Kinetics imaging technique to sample the different regions of slices in the k-space;
- and
- controlling a delay in a gradient in the MRI to reduce a distortion and anisotropy in the echo data from the sample.
A method for magnetic resonance imaging (MRI), comprising:
- applying a magnetic field gradient sequence along a slice direction to partition responses from a sample under magnetic resonance imaging into a plurality of different regions of slices in k-space;
- applying spiral readout gradients to the sample to obtain echo data from the sample;
- applying a Time Resolved Imaging of Contrast Kinetics imaging technique to sample the different regions of slices in the k-space;
- and
- using field map measurements by two single short spiral acquisitions at two different echo times to reduce an off-resonance effect in the MRI image.
A system for magnetic resonance imaging (MRI), comprising:
- a magnetic field source configured to generate a magnetic field;
- a radio frequency system configured to transmit and receive radio frequency signals;
- a sample holder configured to receive and hold a sample;
- and
- a data processing apparatus configured to:
- apply a magnetic field gradient sequence along a slice direction to partition responses from a sample under magnetic resonance imaging into a plurality of different regions of slices in k-space;
- apply spiral readout gradients to the sample to obtain echo data from the sample;
- apply a Time Resolved Imaging of Contrast Kinetics imaging technique to sample the different regions of slices in the k-space;
- and
- control a delay in a gradient in the MRI to reduce a distortion and anisotropy in the echo data from the sample.
A system for magnetic resonance imaging (MRI), comprising:
- a magnetic field source configured to generate a magnetic field;
- a radio frequency system configured to transmit and receive radio frequency signals;
- a sample holder configured to receive and hold a sample;
- and
- a data processing apparatus configured to:
- apply a magnetic field gradient sequence along a slice direction to partition responses from a sample under magnetic resonance imaging into a plurality of different regions of slices in k-space;
- apply spiral readout gradients to the sample to obtain echo data from the sample;
- apply a Time Resolved Imaging of Contrast Kinetics imaging technique to sample the different regions of slices in the k-space;
- and
- use field map measurements by two single short spiral acquisitions at two different echo times to reduce an off-resonance effect in the MRI image.
Dependencies are inferred from the claim text.