Guidewire antenna
First Claim
1. A medical appliance comprising an elongated signal-receiving antenna for detecting and providing magnetic resonance response signals, the antenna adapted to be inserted into the body during magnetic resonance imaging procedures and for providing the response signals used for calculating a position of the medical appliance in the body, wherein the antenna comprises an open wire length including first and second conductor means having proximal ends adapted and arranged for interconnection to a receiver to couple the detected resonance response signals to the receiver, spaced-apart distal ends, and at least a first insulator means for physically separating and electrically insulating adjacent portions of the first and second conductor means, the distal ends of the first and second conductor means and the at least first insulator means adapted and arranged for exposure to a field of electromagnetic energy during a magnetic resonance procedure to couple electromagnetic energy from the field into the antenna and detect and provide the magnetic resonance response signals to the proximal ends of the conductor means.
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Accused Products
Abstract
A medical appliance for use in magnetic resonance imaging procedures. A guidewire for vascular procedures is formed by a coaxial cable acting as antenna in a magnetic resonance imaging system.
348 Citations
27 Claims
- 1. A medical appliance comprising an elongated signal-receiving antenna for detecting and providing magnetic resonance response signals, the antenna adapted to be inserted into the body during magnetic resonance imaging procedures and for providing the response signals used for calculating a position of the medical appliance in the body, wherein the antenna comprises an open wire length including first and second conductor means having proximal ends adapted and arranged for interconnection to a receiver to couple the detected resonance response signals to the receiver, spaced-apart distal ends, and at least a first insulator means for physically separating and electrically insulating adjacent portions of the first and second conductor means, the distal ends of the first and second conductor means and the at least first insulator means adapted and arranged for exposure to a field of electromagnetic energy during a magnetic resonance procedure to couple electromagnetic energy from the field into the antenna and detect and provide the magnetic resonance response signals to the proximal ends of the conductor means.
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13. A medical appliance antenna system for use in connection with magnetic resonance imaging procedures, including:
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a medical appliance comprising an elongated signal-receiving antenna for detecting and providing magnetic resonance response signals, the antenna adapted to be inserted into the body during magnetic resonance imaging procedures and for providing the response signals used for calculating a position of the medical appliance in the body, wherein the antenna includes an open wire length including first and second conductors having proximal ends adapted and arranged for interconnection to a receiver to couple the detected response signals to the receiver, spaced-apart distal ends, and at least a first insulator for physically separating and electrically insulating adjacent portions of the first and second conductors, the distal ends of the first and second conductors and the at least first insulator adapted and arranged for exposure to a field of electromagnetic energy during a magnetic resonance procedure to couple the electromagnetic energy from the field to the antenna and detect and provide the magnetic resonance response signals to the proximal ends of the conductors; and a receiver electrically connected to the antenna for receiving the magnetic resonance response signals and providing information representative of the position of the medical appliance. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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- 20. A medical appliance comprising an elongated and signal-receiving antenna for detecting and providing magnetic resonance response signals, the antenna adapted to be inserted into the body during magnetic resonance imaging procedures and for providing the response signals used for calculating a position of the medical appliance in the body, wherein the antenna comprises an open wire length including first and second conductors having proximal ends adapted and arranged for interconnection to a receiver to couple the detected resonance response signals to the receiver, spaced-apart distal ends, and at least a first insulator for physically separating and electrically insulating adjacent portions of the first and second conductors, the distal ends of the first and second conductors and the at least first insulator adapted and arranged for exposure to a field of electromagnetic energy during a magnetic resonance procedure to couple electromagnetic energy from the field into the antenna and detect and provide the magnetic resonance response signals to the distal ends of the conductors.
Specification