Method and arrangement for wireless communication of signals in a MR system
First Claim
1. An MR imaging system disposed in an RF shielded room which causes RF reflections, RF diffractions, RF scattering, multipath effects, frequency selective fading, RF interferences, and disruptions, the MR imaging system including:
- an MR examination space which receives a subject to be examined, the MR examination space being disposed in the RF shielded room;
a plurality of magnetic resonance coils disposed in the examination space to receive magnetic resonance signals from a subject in the examination space as magnetic resonance data;
a plurality of RF communication channels which are time division multiplexed, each communication channel operating to concurrently send the magnetic resonance data from the magnetic resonance coils across the RF shielded room to downstream electronics and to send control information across the RF shielded to the MR coils, each communication channel comprising a first unit and a second unit, for transmitting and receiving spread spectrum UWB (ultra wide band) signals, the first unit being disposed in the examination space and the first and second units including;
a first unit transmitter which transmits spread spectrum UWB signals carrying the magnetic resonance data across the shielded room to the downstream electronics and a first unit receiver which receives spread spectrum UWB signals carrying the control information from across the shielded room, andat least one second unit transmitter which transmits the control information carried on the spread spectrum UWB signal across the shielded room to the first unit receiver and a second unit receiver which receives the spread spectrum UWB signal carrying the MR data from the first unit transmitter, the second unit receiver being connected with the downstream processing equipment,such that the MR coils are independently controlled over the plurality of communication channels and wirelessly transmit the MR data to the downstream electronics.
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Accused Products
Abstract
A method and an arrangement for uni- or bidirectional wireless communication of signals or data especially in a reflective environment like a MR imaging system, between at least one first transmitter and/or receiver unit (501, 601, 701; T/R1) and at least one second transmitter and/or receiver unit (801; T/R2) is disclosed. The reliability and availability of the communication link especially in a highly reflective environment is improved especially by using spread spectrum technology and ultra wide band carrier frequencies.
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Citations
13 Claims
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1. An MR imaging system disposed in an RF shielded room which causes RF reflections, RF diffractions, RF scattering, multipath effects, frequency selective fading, RF interferences, and disruptions, the MR imaging system including:
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an MR examination space which receives a subject to be examined, the MR examination space being disposed in the RF shielded room; a plurality of magnetic resonance coils disposed in the examination space to receive magnetic resonance signals from a subject in the examination space as magnetic resonance data; a plurality of RF communication channels which are time division multiplexed, each communication channel operating to concurrently send the magnetic resonance data from the magnetic resonance coils across the RF shielded room to downstream electronics and to send control information across the RF shielded to the MR coils, each communication channel comprising a first unit and a second unit, for transmitting and receiving spread spectrum UWB (ultra wide band) signals, the first unit being disposed in the examination space and the first and second units including; a first unit transmitter which transmits spread spectrum UWB signals carrying the magnetic resonance data across the shielded room to the downstream electronics and a first unit receiver which receives spread spectrum UWB signals carrying the control information from across the shielded room, and at least one second unit transmitter which transmits the control information carried on the spread spectrum UWB signal across the shielded room to the first unit receiver and a second unit receiver which receives the spread spectrum UWB signal carrying the MR data from the first unit transmitter, the second unit receiver being connected with the downstream processing equipment, such that the MR coils are independently controlled over the plurality of communication channels and wirelessly transmit the MR data to the downstream electronics. - View Dependent Claims (2, 3, 4)
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5. A magnetic resonance (MR) imaging system comprising:
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an RF shielded room which houses an MR imaging device, the RF shielded room causing RF reflections, RF diffractions, RF scattering, multipath effects, frequency selective fading, RF interferences, and disruptions, the MR imaging device including; an MR examination region which receives an object to be examined; a plurality of MR coil elements which receive MR data from the object in the examination region; a plurality of RF communication channels which operate to concurrently send the MR data from each of the plurality of MR coil elements across the RF shielded room to downstream electronics and to send control information across the RF shield room to the MR coil elements, each communication channel including; a first unit connected with one of the MR coil elements, the first unit including a transmitter which transmits spread spectrum UWB signals carrying the MR data across the shielded room to the downstream electronics and a first unit receiver which receives spread spectrum UWB signals carrying the control information from across the shield room, and a second unit which has at least one second unit transmitter which transmits the control information carried on the spread spectrum UWB signals across the shielded room to the first unit receiver and a second unit receiver which receives the spread spectrum UWB signal carrying the MR data from the first unit transmitter, the second unit receiver being connected with the downstream processing equipment, such that the MR coil elements are independently controlled over the plurality of communications channels and concurrently wirelessly transmit the MR data to the downstream electronics. - View Dependent Claims (6, 7)
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8. A magnetic resonance (MR) imaging system comprising:
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an RF shielded room which houses an MR imaging device, the RF shielded room causing RF reflections, RF diffractions, RF scattering, multipath effects, frequency selective fading, RF interferences, and disruptions, the MR imaging device including; an MR examination region which receives an object to be examined; a plurality of MR coil elements which receive MR data from the object in the examination region; a plurality of time division multiplexed RF communication channels which operate to concurrently send the MR data from each of the plurality of MR coil elements across the RF shielded room to downstream electronics and to send control information across the RF shield room to the MR coil elements, each communication channel including; a first unit connected with one of the MR coil elements, the first unit including a first unit transmitter which transmits spread spectrum signals carrying the MR data across the shielded room to the downstream electronics and a first unit receiver which receives spread spectrum signals carrying the control information from across the shield room, and a second unit which has at least one second unit transmitter which transmits the control information carried on the spread spectrum signals across the shielded room to the first unit receiver and a second unit receiver which receives the spread spectrum signals carrying the MR data from the first unit transmitter, the second unit receiver being connected with the downstream processing equipment, such that the MR coil elements are independently controlled over the plurality of communications channels and concurrently wirelessly transmit the MR data to the downstream electronics; and wherein the first and second unit transmitters and first and second unit receivers each have a plurality of antennas to improve overall bandwidth of spread spectrum signal transmission to remove signal interferences caused by movement in the RF shielded room. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification