Device for high gain and uniformly localized magnetic resonance imaging
First Claim
1. A device adapted for insertion within an organism during a magnetic resonance procedure, said device comprising:
- at least one pair of opposed, non-uniformly-cylindrical, coaxial RF receiver microcoils having a space between each microcoil of said pair of microcoils, at least one of the coils of said microcoils having at least one adjacent pair of windings on at least one microcoil in which a diameter of one winding on the at least one microcoil increases in winding diameter with respect to a diameter of an adjacent winding.
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Accused Products
Abstract
A microcoil configuration, preferably on a medical device to be inserted into a patient, has an opposed pair of microcoils. At least one or each microcoil of the opposed pair of microcoils has at least a region where a diameter circumscribed by a first winding is greater than the diameter circumscribed by at least one complete second winding, especially an adjacent winding displaced from the first winding along an axis or core of the medical device or an axis of the microcoil. The second winding is nearer to or farther from an intermediate region between the microcoils that define the pair of microcoils. For example, it is common to have a connecting (usually straight or non-wound) lead between the two microcoils, and this lead may be used to define an intermediate region. The microcoil configuration with varying circumference between windings (especially adjacent windings) is generally referred to as a dumb-bell or horn configuration because of its general appearance and the individual microcoils are referred to as a horn microcoil, again because of the visual appearance of the microcoil. The configuration of the microcoils assists in defining the properties of an RF responsive field adjacent to the device.
76 Citations
18 Claims
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1. A device adapted for insertion within an organism during a magnetic resonance procedure, said device comprising:
- at least one pair of opposed, non-uniformly-cylindrical, coaxial RF receiver microcoils having a space between each microcoil of said pair of microcoils, at least one of the coils of said microcoils having at least one adjacent pair of windings on at least one microcoil in which a diameter of one winding on the at least one microcoil increases in winding diameter with respect to a diameter of an adjacent winding.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device adapted for insertion within an organism during a magnetic resonance procedure, said device comprising:
- an element having at least one pair of opposed, non-uniformly-cylindrical, coaxial RF receiver microcoils having a space between the pair of opposed microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having diameters so that adjacent windings have winding diameters that increase by at least 1% with respect to an adjacent winding close to the space between the pair of opposed microcoils.
- View Dependent Claims (14, 15, 16)
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17. A device adapted for insertion within an organism during a magnetic resonance procedure, said device comprising:
- at least one pair of non-uniformly-cylindrical coaxial receiver microcoils arranged in opposed fashion, the microcoils arranged in a multiply wound configuration about the coil axis, the microcoils having a space between each microcoil of said at least one pair of microcoils, at least one of the coils of said microcoils having at least one pair of adjacent windings on at least one microcoil in which a diameter of said at least one winding on the at least one microcoil increases in winding diameter with respect to a diameter of an adjacent winding.
- View Dependent Claims (18)
Specification