Gradient coil apparatus for magnetic resonance imaging
First Claim
Patent Images
1. A gradient coil assembly for a magnetic resonance imaging system comprising:
- an first gradient coil configured to generate a first gradient field in a first field of view;
a second gradient coil configured to generate a second gradient field orthogonal to said first gradient field in a second field of view; and
a third gradient coil configured to generate a third gradient field orthogonal to said first gradient field and said second gradient field in a plurality of fields of view.
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Abstract
A gradient coil assembly for a magnetic resonance imaging system comprising: a first gradient coil configured to generate a first gradient field in a first field of view; a second gradient coil configured to generate a second gradient field orthogonal to the first gradient field in a second field of view; and a third gradient coil configured to generate a third gradient field orthogonal to the first gradient field and the second gradient field in a plurality of fields of view.
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Citations
25 Claims
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1. A gradient coil assembly for a magnetic resonance imaging system comprising:
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an first gradient coil configured to generate a first gradient field in a first field of view;
a second gradient coil configured to generate a second gradient field orthogonal to said first gradient field in a second field of view; and
a third gradient coil configured to generate a third gradient field orthogonal to said first gradient field and said second gradient field in a plurality of fields of view. - View Dependent Claims (2, 3, 4)
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5. A gradient coil assembly for a magnetic resonance imaging system comprising
an first gradient coil configured to generate a first gradient field in a single field of view; -
a second gradient coil configured to generate a second gradient field orthogonal to said first gradient field in at least one field of view; and
a third gradient coil configured to generate a third gradient field orthogonal to said first gradient field and said second gradient field in a plurality of fields of view; and
wherein at least one of said first gradient coil and said second gradient coil comprise only a single coil and said third gradient coil comprises a plurality coils configured to generate said plurality of fields of view. - View Dependent Claims (6, 7)
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8. A method for decreasing gradient field pulse sequence duration for a magnetic resonance imaging system, the method comprising:
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establishing an allowable gradient field strength for an axis of a plurality of axes for a field of view;
applying a weighting factor associated with each said axis of said plurality of axes;
establishing a slew rate responsive to a selected axis of said plurality of axes that exhibits a largest gradient field strength in light of said weighting factor and said field of view; and
operating said plurality of axes at said largest gradient field strength. - View Dependent Claims (9, 10, 11, 12)
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13. A method for reducing peripheral nerve stimulation for a magnetic resonance imaging system, the method comprising:
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establishing an allowable gradient field strength for an axis of a plurality of axes for a field of view;
applying a weighting factor associated with each said axis of said plurality of axes;
establishing a slew rate responsive to a selected axis of said plurality of axes that exhibits a largest gradient field strength in light of said weighting factor and said field of view; and
operating said plurality of axes at said largest gradient field strength. - View Dependent Claims (14, 15, 16, 17)
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18. A system for decreasing gradient field pulse sequence duration in a magnetic resonance imaging system, comprising:
a magnetic resonance imaging system including a gradient coil assembly for a magnetic resonance imaging system comprising;
an first gradient coil configured to generate a first gradient field in a first field of view;
a second gradient coil configured to generate a second gradient field orthogonal to said first gradient field in a second field of view; and
a third gradient coil configured to generate a third gradient field orthogonal to said first gradient field and said second gradient field in a plurality of fields of view. - View Dependent Claims (19, 20, 21)
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22. A system for reducing peripheral nerve stimulation in a magnetic resonance imaging system, comprising:
a magnetic resonance imaging system including a gradient coil assembly for a magnetic resonance imaging system comprising;
an first gradient coil configured to generate a first gradient field in a first field of view;
a second gradient coil configured to generate a second gradient field orthogonal to said first gradient field in a second field of view; and
a third gradient coil configured to generate a third gradient field orthogonal to said first gradient field and said second gradient field in a plurality of fields of view.
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23. A storage medium encoded with a machine-readable computer program code;
said code including instructions for causing a computer to implement a method for reducing peripheral nerve stimulation for a magnetic resonance imaging system, the method comprising;
establishing an allowable gradient field strength for an axis of a plurality of axes for a field of view;
applying a weighting factor associated with each said axis of said plurality of axes;
establishing a slew rate responsive to a selected axis of said plurality of axes that exhibits a largest gradient field strength in light of said weighting factor and said field of view; and
operating said plurality of axes at said largest gradient field strength.
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24. A computer data signal comprising code configured to cause a processor to implement a method for reducing peripheral nerve stimulation in a magnetic resonance imaging system, the method comprising:
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establishing an allowable gradient field strength for an axis of a plurality of axes for a field of view;
applying a weighting factor associated with each said axis of said plurality of axes;
establishing a slew rate responsive to a selected axis of said plurality of axes that exhibits a largest gradient field strength in light of said weighting factor and said field of view; and
operating said plurality of axes at said largest gradient field strength.
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25. A system for decreasing gradient field pulse sequence duration and reducing peripheral nerve stimulation with known gradient pulse areas for a magnetic resonance imaging system, the method comprising:
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a means for establishing an allowable gradient field strength for an axis of a plurality of axes for a field of view;
a means for applying a weighting factor associated with each said axis of said plurality of axes;
a means for establishing a slew rate responsive to a selected axis of said plurality of axes that exhibits a largest gradient field strength in light of said weighting factor and said field of view; and
a means for operating said plurality of axes at said largest gradient field strength.
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Specification