Multi-channel magnetic resonance imaging and spectroscopy
First Claim
1. A magnetic resonance system comprising multiple radio-frequency coils configured to apply a magnetic resonance pulse sequence including at least a preparation segment and an acquisition segment, wherein the preparation segment and the acquisition segment each comprise one or more excitation pulses, the magnetic resonance system further comprising:
- a first control unit configured to apply the one or more excitation pulses of the preparation segment by activating the multiple radio-frequency coils in a first excitation pattern;
a second control unit configured to apply the one or more excitation pulses of the acquisition segment by activating the multiple radio-frequency coils in a second excitation pattern;
a third control unit, wherein the third control unit is configured to activate a first set of radio-frequency coils from the multiple radio-frequency coils during the preparation segment, and to activate a second set of radio-frequency coils from the multiple radio-frequency coils during the acquisition segment, and wherein the third control unit is further configured to include at least one radio-frequency coil from the multiple radio-frequency coils in either only the first set or only the second set of radio-frequency coils.
1 Assignment
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Accused Products
Abstract
A magnetic resonance (MR) system comprising multiple radio-frequency (RP) coils (303) configured to apply an MR pulse sequence (100) including at least a preparation segment (PRP) and an acquisition segment (ACQ), wherein the preparation segment (PRP) and the acquisition segment (ACQ) each comprise one or more excitation pulses, is disclosed herein. The MR system further comprises a first control unit (308) configured to apply the one or more excitation pulses of the preparation segment (PRP) by activating the multiple radio-frequency coils in a first excitation pattern, and a second control unit configured to apply the one or more excitation pulses of the acquisition segment (ACQ) by activating the multiple radio-frequency coils in a second excitation pattern, thereby providing dynamic rf shimming.
17 Citations
19 Claims
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1. A magnetic resonance system comprising multiple radio-frequency coils configured to apply a magnetic resonance pulse sequence including at least a preparation segment and an acquisition segment, wherein the preparation segment and the acquisition segment each comprise one or more excitation pulses, the magnetic resonance system further comprising:
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a first control unit configured to apply the one or more excitation pulses of the preparation segment by activating the multiple radio-frequency coils in a first excitation pattern; a second control unit configured to apply the one or more excitation pulses of the acquisition segment by activating the multiple radio-frequency coils in a second excitation pattern; a third control unit, wherein the third control unit is configured to activate a first set of radio-frequency coils from the multiple radio-frequency coils during the preparation segment, and to activate a second set of radio-frequency coils from the multiple radio-frequency coils during the acquisition segment, and wherein the third control unit is further configured to include at least one radio-frequency coil from the multiple radio-frequency coils in either only the first set or only the second set of radio-frequency coils. - View Dependent Claims (2)
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3. A method of operating multiple radio-frequency coils configured to apply a magnetic resonance pulse sequence including at least a preparation segment and an acquisition segment, wherein the preparation segment and the acquisition segment each comprise one or more excitation pulses, the method comprising:
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applying the one or more excitation pulses of the preparation segment by activating the multiple radio-frequency coils in a first excitation pattern, the preparation segment including pulses for at least one of fat suppression, contrast preparation, spatial selection, and spatial saturation; and applying the one or more excitation pulses of the acquisition segment by activating the multiple radio-frequency coils in a second excitation pattern. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating multiple radio-frequency coils configured to apply a magnetic resonance pulse sequence at least a preparation segment and an acquisition segment wherein the preparation segment and the acquisition segment each comprise one or more excitation pulses, the method comprising:
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applying one or more excitation pulses of the preparation segment by activating a first set of radio-frequency coils from the multiple radio-frequency coils during the preparation segment; and applying the one or more excitation pulses of the acquisition segment by activating a second set of radio-frequency coils from the multiple radio-frequency coils during the acquisition segment, wherein at least one radio-frequency coil from the multiple radio-frequency coils is included in either only the first set or the second set of radio-frequency coils. - View Dependent Claims (15, 16, 17)
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18. A magnetic resonance system comprising:
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a multi-transmit coil system including a plurality of independent individual coil elements disposed adjacent an imaging region; an RF coil driver which drives the coil elements independently to define a plurality of independent drive channels; a controller which controls the RF coil driver and the multi-transmit coil system to; apply one or more excitation pulses of a preparation segment in a first excitation pattern to prepare spins for imaging; apply a plurality of acquisition segments following each preparation sequence, including at least one excitation pulse with a different excitation pattern than the first excitation pattern. - View Dependent Claims (19)
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Specification