Wireless interventional device and a system for wireless energy transmission
First Claim
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1. An MR compatible interventional system comprising:
- an interventional catheter configured to be inserted in a human body located in a body coil of a magnetic resonance imager, the interventional catheter including;
an electrically powered unit which carries out an interaction with an interior of the body,a resonant circuit which wirelessly receives RF electromagnetic energy, and converts the received RF electromagnetic energy into electric power,a remote unit remote from the interventional catheter and connected by only resistive wires with the interventional catheter, the resistive wires carrying feedback signals indicative of an amount of the electric power wirelessly delivered to the electrically powered unit by the resonant circuit, the remote unit including;
an RF transmitter which generates the RF electromagnetic energy received by the resonant circuit, anda controller which controls the RF transmitter to control an amount of power in the generated RF electromagnetic energy in accordance with the feedback signals.
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Abstract
An interventional device (12) is configured to be positioned in a body and includes an electrically operable unit (E1, E2) configured to carry out an interaction with the body upon a receipt of electric power. The device further includes a sensor (2) configured for wirelessly receiving electromagnetic energy from a remote source. The sensor is configured as a resonant circuit (2a, 2b) which converts the received electromagnetic energy into the electric power. The electrically operable device may include a diagnostic and/or therapeutic module.
22 Citations
20 Claims
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1. An MR compatible interventional system comprising:
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an interventional catheter configured to be inserted in a human body located in a body coil of a magnetic resonance imager, the interventional catheter including; an electrically powered unit which carries out an interaction with an interior of the body, a resonant circuit which wirelessly receives RF electromagnetic energy, and converts the received RF electromagnetic energy into electric power, a remote unit remote from the interventional catheter and connected by only resistive wires with the interventional catheter, the resistive wires carrying feedback signals indicative of an amount of the electric power wirelessly delivered to the electrically powered unit by the resonant circuit, the remote unit including; an RF transmitter which generates the RF electromagnetic energy received by the resonant circuit, and a controller which controls the RF transmitter to control an amount of power in the generated RF electromagnetic energy in accordance with the feedback signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An interventional system comprising:
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an interventional catheter including; a receive coil disposed at a tip of the interventional catheter and tuned to a preselected frequency such that the receive coil receives RF signals and converts the received RF signals to electric power without wires running along the interventional catheter, electrodes connected with the receive coil such that the electrodes receive the electric power from the receive coil, a measuring unit which measures level of the electric power at the electrodes; a remote unit remote from the interventional catheter, the remote unit including; a transmitter which transmits the RF Signals at the preselected frequency with an adjustable level of power, a controller which compares the measured level of the electric power supplied to the electrodes with a preselected level of the electric power and adjusts a delivered level of RF transmit power with which the transmitter transmits the RF signals in accordance with an error between the measured level of power and the preselected level of power. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An interventional system comprising:
an interventional catheter including; a receive coil tuned to a preselected frequency with a capacitor connected with the receive coil such that the receive coil receives RF signals and converts the received RF signals to electric power, first and second electrodes connected with the receive coil by a first line connected with a first of the first and second electrodes and with a second line connected to a second of the first and second electrodes such that the first and second electrodes receive the electric power from the receive coil; a diode and a shunt capacitor connected with the first and second lines to rectify the electric power to a DC wave form; a measuring unit which measures a level of the electric power at the electrodes, the measuring unit being connected between the shunt capacitor and the diode and at least one of the electrodes. - View Dependent Claims (20)
Specification