Hybrid birdcage-TEM radio frequency (RF) coil for multinuclear MRI/MRS
First Claim
1. A radio frequency (RF) coil for a magnetic resonance imaging system, the RF coil comprising:
- a plurality of rungs disposed around a volume;
a first end ring connected to a first end of the plurality of rungs, the first end ring comprising a first plurality of birdcage mode tuning capacitors and a first plurality of passive RF traps, each passive RF trap in the first plurality of passive RF traps being connected in series with a respective birdcage mode tuning capacitor in the first plurality of birdcage mode tuning capacitors;
a second end ring connected to a second end of the plurality of rungs, the second end ring comprising a second plurality of birdcage mode tuning capacitors and a second plurality of passive RF traps, each passive RF trap in the second plurality of passive RF trap being connected in series with a respective birdcage mode tuning capacitor in the second plurality of birdcage mode turning capacitors;
an RF shield disposed around the plurality of rungs, the first end ring and the second end ring;
a plurality of transverse electromagnetic (TEM) mode tuning capacitors each TEM mode tuning capacitor coupled to one of the plurality of rungs; and
a third plurality of RF traps, each RF trap in the third plurality of RF traps coupled to one of the plurality of TEM mode tuning capacitors and the RF shield.
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Accused Products
Abstract
A radio frequency (RF) coil for a magnetic resonance imaging system includes a plurality of rungs disposed around a volume and a first end ring connected to a first end of the plurality of rungs. The first end ring has a first plurality of birdcage mode tuning capacitors and a first plurality of RF traps. The RF coil also includes a second end ring connected to a second end of the plurality of rungs. The second end ring has a second plurality of birdcage mode tuning capacitors and a second plurality of RF traps. An RF shield is disposed around the plurality of rungs, the first end ring and the second end ring. The RF coil also includes a plurality of transverse electromagnetic (TEM) mode tuning capacitors, where each TEM mode tuning capacitor coupled to one of the plurality of rungs. An RF trap is connected to each of the plurality of TEM mode tuning capacitors.
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Citations
22 Claims
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1. A radio frequency (RF) coil for a magnetic resonance imaging system, the RF coil comprising:
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a plurality of rungs disposed around a volume; a first end ring connected to a first end of the plurality of rungs, the first end ring comprising a first plurality of birdcage mode tuning capacitors and a first plurality of passive RF traps, each passive RF trap in the first plurality of passive RF traps being connected in series with a respective birdcage mode tuning capacitor in the first plurality of birdcage mode tuning capacitors; a second end ring connected to a second end of the plurality of rungs, the second end ring comprising a second plurality of birdcage mode tuning capacitors and a second plurality of passive RF traps, each passive RF trap in the second plurality of passive RF trap being connected in series with a respective birdcage mode tuning capacitor in the second plurality of birdcage mode turning capacitors; an RF shield disposed around the plurality of rungs, the first end ring and the second end ring; a plurality of transverse electromagnetic (TEM) mode tuning capacitors each TEM mode tuning capacitor coupled to one of the plurality of rungs; and a third plurality of RF traps, each RF trap in the third plurality of RF traps coupled to one of the plurality of TEM mode tuning capacitors and the RF shield. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A resonance assembly for a magnetic resonance imaging system, the resonance assembly comprising:
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a superconducting magnet; a gradient coil assembly disposed within an inner diameter of the superconducting magnet; a radio frequency (RF) coil disposed within an inner diameter of the gradient coil assembly and comprising; a first end ring comprising a first plurality of RF mode tuning capacitors tuned to a first resonant frequency; a second end ring comprising, a second plurality of RF mode tuning capacitors tuned to the first resonant frequency; a plurality of rungs disposed between and connected to the first end ring and the second end ring; a plurality of TEM mode tuning capacitors coupled to the plurality of rungs and tuned to a second resonant frequency; and an RF shield disposed around the first end ring, the second end ring, the plurality of rungs and the plurality of TEM mode tuning capacitors, the RF shield coupled to the plurality of TEM mode tuning capacitors. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification