Size-variable local coil matrix with variable decoupling
First Claim
Patent Images
1. A local coil matrix for a magnetic resonance tomograph, the local coil matrix comprising:
- a first coil having two detachable coil segments; and
a tuning device having a tuning element and a position detector,wherein the two detachable coil segments have electrical connecting elements configured to produce an electrical connection between the two detachable coil segments in different relative positions of the two detachable coil segments to each other,wherein the tuning device is configured to tune a resonance circuit, which the first coil has in different relative positions of the two detachable coil segments of the first coil, to a predetermined resonance frequency,wherein the position detector of the tuning device is configured to determine a relative position of the two detachable coil segments to each other, andwherein the tuning device is configured to alter a parameter of the tuning element as a function of the relative position such that the resonance circuit is tuned to the predetermined resonance frequency.
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Abstract
A local coil matrix for a magnetic resonance tomograph and a magnetic resonance tomograph with a local coil matrix are provided. The local coil matrix has a first coil with two detachable coil segments. The two coil segments have electrical connecting elements. The electrical connecting elements are configured to produce an electrical connection between the coil segments in different relative positions of the two coil segments to each other.
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Citations
19 Claims
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1. A local coil matrix for a magnetic resonance tomograph, the local coil matrix comprising:
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a first coil having two detachable coil segments; and a tuning device having a tuning element and a position detector, wherein the two detachable coil segments have electrical connecting elements configured to produce an electrical connection between the two detachable coil segments in different relative positions of the two detachable coil segments to each other, wherein the tuning device is configured to tune a resonance circuit, which the first coil has in different relative positions of the two detachable coil segments of the first coil, to a predetermined resonance frequency, wherein the position detector of the tuning device is configured to determine a relative position of the two detachable coil segments to each other, and wherein the tuning device is configured to alter a parameter of the tuning element as a function of the relative position such that the resonance circuit is tuned to the predetermined resonance frequency. - View Dependent Claims (2, 3, 4, 11, 12, 13, 14, 15, 16, 17, 18)
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5. A local coil matrix for a magnetic resonance tomograph, the local coil matrix comprising:
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a first coil having two detachable coil segments; and a first tuning device having a tuning element, wherein the two detachable coil segments have electrical connecting elements configured to produce an electrical connection between the two detachable coil segments in different relative positions of the two detachable coil segments to each other, wherein the first tuning device is configured to tune a resonance circuit, which the first coil has in different relative positions of the two detachable coil segments of the first coil, to a predetermined resonance frequency, and wherein the tuning element of the first tuning device has a changeable inductance or a module with complex resistance. - View Dependent Claims (6, 7, 8, 9, 10)
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19. A magnetic resonance tomograph comprising:
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a local coil matrix having; a coil with two detachable coil segments, the two detachable coil segments comprising electrical connecting elements configured to produce an electrical connection between the two detachable coil segments in different relative positions of the two detachable coil segments to each other; and a tuning device having a tuning element and a position detector, wherein the tuning device is configured to tune a resonance circuit, which the coil has in different relative positions of the two detachable coil segments of the coil, to a predetermined resonance frequency, wherein the position detector of the tuning device is configured to determine a relative position of the two detachable coil segments to each other, and wherein the tuning device is configured to alter a parameter of the tuning element as a function of the relative position such that the resonance circuit is tuned to the predetermined resonance frequency; and a control having a signal connection to the local coil matrix, wherein the control is configured to adjust the tuning element as a function of the relative position of the two detachable coil segments of the coil to each other such that the resonance circuit has the predetermined resonance frequency with the coil.
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Specification