Inductively powered electric component of an MRI apparatus
First Claim
1. A nuclear magnetic resonance imaging apparatus comprising:
- a main magnet adapted for generating a main magnetic field;
at least one radio frequency receiver coil unit for acquiring magnetic resonance signals in a receiver coil radio frequency band from an examined object;
means for inductively supplying electric power to an electric component of the apparatus, wherein the electric component is adapted to be powered by inductively supplied electric power, wherein a power transfer frequency and higher harmonics of the power transfer frequency for inductively supplying the electric power are located outside the receiver coil radio frequency band;
means for determining at least one flanking frequency of actually supplied higher harmonics of the power transfer frequency; and
means for adjusting the power transfer frequency using said determined flanking frequency.
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Accused Products
Abstract
The invention relates to a nuclear magnetic resonance imaging apparatus comprising: a main magnet (122) adapted for generating a main magnetic field; at least one radio frequency receiver coil unit (144) for acquiring magnetic resonance signals in a receiver coil radio frequency band (202) from an examined object (124); means (140) for inductively (wirelessly) supplying electric power to an electric component of the apparatus, wherein the electric component is adapted to be powered by inductively supplied electric power, wherein the power transfer frequency (200) and the higher-harmonics (206) of the power transfer frequency (200) for inductively supplying the electric power are located outside the receiver coil radio frequency band (202).
19 Citations
12 Claims
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1. A nuclear magnetic resonance imaging apparatus comprising:
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a main magnet adapted for generating a main magnetic field; at least one radio frequency receiver coil unit for acquiring magnetic resonance signals in a receiver coil radio frequency band from an examined object; means for inductively supplying electric power to an electric component of the apparatus, wherein the electric component is adapted to be powered by inductively supplied electric power, wherein a power transfer frequency and higher harmonics of the power transfer frequency for inductively supplying the electric power are located outside the receiver coil radio frequency band; means for determining at least one flanking frequency of actually supplied higher harmonics of the power transfer frequency; and means for adjusting the power transfer frequency using said determined flanking frequency. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric component of a nuclear magnetic resonance imaging apparatus, the apparatus comprising:
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a nuclear magnetic resonance imaging receiving coil unit for acquiring magnetic resonance signals in a receiver coil radio frequency band from an examined object, the electric component comprising an inductive reception coil configured to receive electric power, wherein a power transfer frequency and higher harmonics of the power transfer frequency are located outside the receiver coil radio frequency band; a sensor configured to determine at least one flanking frequency of actually supplied higher harmonics of the power transfer frequency, wherein the power transfer frequency is adjusted using said determined flanking frequency. - View Dependent Claims (8, 9)
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10. A method of performing nuclear magnetic resonance imaging of an object, the method being performed by a nuclear magnetic resonance imaging apparatus, the method comprising:
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exciting nuclear magnetization within the object; inductively supplying electric power to an electric component of the apparatus, wherein the electric component is powered by inductively supplied electric power, the apparatus comprising a radio frequency receiver coil unit, the radio frequency receiver coil unit being adapted for acquiring magnetic resonance signals in a receiver coil radio frequency band from the object upon excitation of the object, wherein a power transfer frequency and higher harmonics of the power transfer frequency for inductively supplying the electric power are located outside the receiver coil radio frequency band; receiving the acquired magnetic resonance signals from the receiver coil unit; determining at least one flanking frequency of actually supplied higher harmonics of the power transfer frequency; and adjusting the power transfer frequency using said determined flanking frequency. - View Dependent Claims (11)
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12. A method of acquiring magnetic resonance imaging signals in a receiver coil radio frequency band from an examined object, the method comprising:
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inductively receiving electric power, wherein a power transfer frequency and higher harmonics of the power transfer frequency are located outside the receiver coil radio frequency band; acquiring the magnetic resonance signals from the examined object; transmitting the acquired magnetic resonance signals to a nuclear magnetic resonance imaging apparatus; determining at least one flanking frequency of actually supplied higher harmonics of the power transfer frequency; and adjusting the power transfer frequency using said determined flanking frequency.
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Specification