MR-compatible medical devices
First Claim
1. A medical device for use within a living organism, said medical device comprising:
- an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10%.
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Accused Products
Abstract
The use of devices in procedures, especially medical procedures where the events take place under view of Magnetic Resonance Imaging (MRI) systems is becoming more important. Although some general and specific structures have been discussed in the literature and commercialized, little has been done effectively to design devices for MRI procedures for specific tasks. The present invention describes a device for use within an organism, said device comprising an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, the coils of said microcoils may have diameters of less than 2.4 mm. The device may also comprise an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual coils, said at least three individual coils of said microcoils having spacing between adjacent microcoils so that spacing between at least two pairs of individual coils within said microcoils differ by at least 10%. Circuitry may be insulated within the device by providing the wires and circuits within different layers in a coaxial layering of components within the catheter. The device may also comprise device an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, the RF receiver microcoils each comprising at least three individual windings, the at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within the microcoils differ by at least 10%.
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Citations
20 Claims
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1. A medical device for use within a living organism, said medical device comprising:
- an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10%.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device for use within a living organism, said medical device comprising:
- an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, said RF receiver microcoils each comprising at least three individual windings, said at least three individual windings of said microcoils having spacing between adjacent windings so that spacing between at least two pairs of individual windings within said microcoils differ by at least 10% wherein said at least one pair of RF receiver microcoils has a space between each half of said pair of microcoils, said at least one pair of RF receiver microcoils produces a field strength having a field strength maximum within a volume surrounding said space between each half of said pair of microcoils, and produces a second field strength at a position along a line parallel to an elongate axis of said device halfway between a midpoint position within said space and a near end of a microcoil forming a part of said at least one pair of RF receiver microcoils, said second field strength, along a line parallel to an elongate axis of said device, being no more than 40% less than said maximum field strength between said microcoils.
- View Dependent Claims (9, 10, 11, 12)
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13. A medical device for use within an organism, said medical device comprising:
- an element having at least one pair of opposed RF receiver microcoils having a space between each microcoil of said pair of microcoils, coils of said microcoils having diameters of less than 2.4 mm wherein at least one set of microcoils comprising a half of said at least one pair of microcoils comprises at least four windings having at least three spaces between adjacent windings of dimensions spacing 1, spacing 2 and spacing three, wherein at least one of said at least three spaces does not equal the dimensions of at least one other of said spaces.
- View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
Specification