Double-tuned RF coil
First Claim
1. An RF coil resonating at a first resonance frequency and a second resonance frequency respectively corresponding to a first element and a second element being different in magnetic resonance frequency, comprising at least one conductor loop,wherein the conductor loop has a parallel circuit including a first branch comprising a first capacitor and a second branch comprising a third capacitor and a first parallel resonance circuit configured by a second capacitor and a first inductor;
- the first capacitor has capacity to cause the RF coil to resonate at signal transmission and reception of the first resonance frequency when the first resonance frequency is higher than the second resonance frequency;
product of a value of the second capacitor and a value of the first inductor is determined as a value thereof based on the first resonance frequency; and
the third capacitor has such capacity that a resonance frequency for a series circuit configured by the first parallel resonance circuit and the third capacitor gets higher than the second resonance frequency at the time of transmission and reception of a second resonance frequency signal.
1 Assignment
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Accused Products
Abstract
An RF coil has at least one conductor loop and a parallel circuit provided with a first branch and a second branch is installed. The first branch has a first capacitor and the second branch has a third capacitor and a first parallel resonance circuit configured by a second capacitor and a first inductor. The first capacitor has capacity to allow the RF coil to resonate at the time of transmission/reception of the first resonance frequency signal corresponding to an element with a higher magnetic resonance frequency, and capacity of the second capacitor and a value of the first inductor are determined as an accumulated value thereof based on the first resonance frequency. The third capacitor has capacity to allow the RF coil to resonate at the time of transmission/reception of the second resonance frequency signal corresponding to an element with a lower magnetic resonance frequency.
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Citations
25 Claims
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1. An RF coil resonating at a first resonance frequency and a second resonance frequency respectively corresponding to a first element and a second element being different in magnetic resonance frequency, comprising at least one conductor loop,
wherein the conductor loop has a parallel circuit including a first branch comprising a first capacitor and a second branch comprising a third capacitor and a first parallel resonance circuit configured by a second capacitor and a first inductor; -
the first capacitor has capacity to cause the RF coil to resonate at signal transmission and reception of the first resonance frequency when the first resonance frequency is higher than the second resonance frequency; product of a value of the second capacitor and a value of the first inductor is determined as a value thereof based on the first resonance frequency; and the third capacitor has such capacity that a resonance frequency for a series circuit configured by the first parallel resonance circuit and the third capacitor gets higher than the second resonance frequency at the time of transmission and reception of a second resonance frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification