MULTI-PURPOSE GRADIENT ARRAY FOR MAGNETIC RESONANCE IMAGING
First Claim
Patent Images
1. A system for multi-slice magnetic resonance imaging (MM), comprising:
- a gradient coil array comprising a plurality of independent coils distributed about an enclosure; and
a controller configured to concurrently actuate said plurality of coils so as to generate a spatially-varying magnetic field within said enclosure such that for at least first and second volumetric slices, a magnetic field magnitude associated with at least one location in the first volumetric slice is substantially equal to a magnetic field magnitude associated with a respective location in the second volumetric slice.
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Abstract
A system for multi-slice magnetic resonance imaging (MM) comprises a gradient coil array comprising a plurality of independent coils distributed about an enclosure; and a controller configured to concurrently actuate said plurality of coils so as to generate a spatially-varying magnetic field within said enclosure such that for at least first and second volumetric slices, a magnetic field magnitude associated with at least one location in the first volumetric slice is substantially equal to a magnetic field magnitude associated with a respective location in the second volumetric slice.
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Citations
34 Claims
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1. A system for multi-slice magnetic resonance imaging (MM), comprising:
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a gradient coil array comprising a plurality of independent coils distributed about an enclosure; and a controller configured to concurrently actuate said plurality of coils so as to generate a spatially-varying magnetic field within said enclosure such that for at least first and second volumetric slices, a magnetic field magnitude associated with at least one location in the first volumetric slice is substantially equal to a magnetic field magnitude associated with a respective location in the second volumetric slice. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A magnetic resonance imaging system, comprising:
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a magnetic field generator having a gradient coil array, each coil of the array being configured to generate a magnetic field independent of a magnetic field generated by any of the other coils of the array; a set of amplifiers, each of which being in electrical communication with one of said coils of the array for applying an excitation signal to said coil; and a controller in electrical communication with said amplifiers and configured to apply a plurality of signals to said amplifiers such that the amplifiers apply a plurality of excitation signals to said coils for generating a magnetic field such at least first and second volumetric slices associated with at least two of said coils exhibit a magnetic field distribution characterized by substantially similar magnetic field gradients.
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31. A method for generating a magnetic resonance image, comprising applying a static magnetic field to an enclosure configured to receive a sample;
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utilizing a plurality of independent coils to generate a gradient magnetic field in said enclosure, said gradient magnetic field characterized by spatial variations such that for at least first and second volumetric slices, a magnetic field magnitude associated with at least one location in the first volumetric slice is substantially equal to a magnetic field magnitude associated with a respective location in the second volumetric slice; and applying an RF pulse signal to said first and second volumetric slices to excite a selected spin of said sample. - View Dependent Claims (32, 33, 34)
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Specification