Method for mode formation, method for mode provision, and reception unit for a magnetic resonance device
First Claim
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1. A method for forming at least two modes for a magnetic resonance imaging apparatus, comprising the steps of:
- receiving at least two magnetic resonance response signals respectively with at least two local antennas;
generating a primary mode by combining said received magnetic resonance response signals in a first weighted linear combination, said primary mode corresponding to a magnetic resonance signal of an amplitude-controlled and phase-controlled group antenna exhibiting a first sensitivity distribution that is optimized for a target region within a detection volume of said local antennas;
generating a secondary mode by combining said received magnetic resonance response signals in a second weighted linear combination, said secondary mode corresponding to a magnetic resonance signal of an amplitude-controlled and phase-controlled group antenna exhibiting a second sensitivity distribution that is different from said first sensitivity distribution in a phase coding direction of said response signals; and
supplying said primary mode to a first reception channel of a magnetic resonance imaging unit and supplying said secondary mode to a second reception channel of said magnetic resonance imaging unit.
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Abstract
A reception unit for an MR device with at least two local antennas has a combination network to which the antennas are connected separately for combination of the antenna signals. The combination network generates at least two different modes that are linear combinations of the antenna signals, and at least two of which are present at an output of the combination network.
33 Citations
38 Claims
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1. A method for forming at least two modes for a magnetic resonance imaging apparatus, comprising the steps of:
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receiving at least two magnetic resonance response signals respectively with at least two local antennas; generating a primary mode by combining said received magnetic resonance response signals in a first weighted linear combination, said primary mode corresponding to a magnetic resonance signal of an amplitude-controlled and phase-controlled group antenna exhibiting a first sensitivity distribution that is optimized for a target region within a detection volume of said local antennas; generating a secondary mode by combining said received magnetic resonance response signals in a second weighted linear combination, said secondary mode corresponding to a magnetic resonance signal of an amplitude-controlled and phase-controlled group antenna exhibiting a second sensitivity distribution that is different from said first sensitivity distribution in a phase coding direction of said response signals; and supplying said primary mode to a first reception channel of a magnetic resonance imaging unit and supplying said secondary mode to a second reception channel of said magnetic resonance imaging unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for providing modes for magnetic resonance imaging in a magnetic resonance imaging apparatus, comprising the steps of:
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providing at least two local antennas having, in combination, a field of view that defines a detection volume of an examination subject, and substantially simultaneously receiving one magnetic resonance response signal with each of said local antennas, said response signal comprising signal components that are spatially associated with respective regions in said detection volume; generating a primary mode by combining said magnetic resonance response signals in a first weighted linear combination, said primary mode corresponding to a magnetic resonance signal of an amplitude-controlled and phase-controlled group antenna exhibiting a first sensitivity distribution that is optimized for a target region within said detection volume of said local antennas; generating a secondary mode by combining said response signals in a second weighted linear combination, said secondary mode corresponding to a magnetic resonance signal of an amplitude-controlled and phase-controlled group antenna exhibiting a second sensitivity distribution that is different from said first sensitivity distribution in a phase coding direction of said response signals; and supplying said primary mode to a first reception channel of a magnetic resonance imaging unit and supplying said secondary mode to a second reception channel of said magnetic resonance imaging unit. - View Dependent Claims (18, 19, 20, 21)
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22. A reception unit for a magnetic resonance imaging apparatus, comprising:
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at least two local antennas; and a combination network to which said at least two local antennas are separately connected, said combination unit generating at least two different modes from respectively different linear combinations of antenna signals respectively received by said at least two local antennas, said combination network having at least two outputs at which at least two of said at least two different modes are respectively present. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification