METHOD AND ARRANGEMENT TO TRANSMIT MAGNETIC RESONANCE SIGNALS
First Claim
1. A circuit for transmitting magnetic resonance signals comprising:
- a magnetic resonance local coil assembly comprising a plurality of channels;
a first of said channels comprising a first individual antenna configured to receive a first magnetic resonance signal and a first frequency converter connected to said first individual antenna, said first frequency converter being configured to form a first signal from said first magnetic resonance signal and a first oscillator signal supplied to said first frequency converter;
a second of said channels comprising a second individual antenna configured to receive a second magnetic resonance signal and a second frequency converter connected to said second individual antenna, said second frequency converter being configured to form a second signal from said second magnetic resonance signal and a second oscillator signal supplied to said second frequency converter;
a signal combiner supplied with said first signal and said second signal that applies both of said first signal and said second signal to a single transmission path forming an output of said local coil assembly;
a first input to said local coil assembly to which a first synthesizer signal is supplied, said first synthesizer signal having a first synthesizer signal frequency;
a second input to said local coil assembly to which a second synthesizer is supplied, said second synthesizer signal having a second synthesizer signal frequency; and
an oscillator signal source in said local coil assembly connected to said first and second inputs, said oscillator signal source supplying said first oscillator signal to said first frequency converter and supplying said second oscillator signal to said second frequency converter, and said oscillator signal source being configured to form at least one of said first and second oscillator signals with an oscillator signal frequency that is a difference between said first synthesizer signal frequency and said second synthesizer signal frequency, said first and second synthesizer signal frequencies being set so that said difference, corresponding to said oscillator signal frequency, allows said first and second signals to both be transmitted via said single transmission path.
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Accused Products
Abstract
In a method and an arrangement for magnetic resonance signal transmission, a first channel of a local coil arrangement has a first individual antenna that receives a first magnetic resonance signal, and a first frequency converter connected with the first individual antenna, and the first frequency converter forms a first signal with the first magnetic resonance signal supplied thereto and a first oscillator signal supplied thereto. A second channel of the local coil arrangement has a second individual antenna that receives a second magnetic resonance signal, and a second frequency converter connected with the second individual antenna, and the second frequency converter forms a second signal from the second magnetic resonance signal supplied thereto and a second oscillator signal supplied thereto. The local coil arrangement has a signal combination device that applies the first signal and the second signal to a single transmission path. At least one of the oscillator signals has a frequency that corresponds to the difference between the frequency of a first synthesizer frequency signal and the frequency of a second synthesizer frequency signal that are supplied to the local coil arrangement.
12 Citations
16 Claims
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1. A circuit for transmitting magnetic resonance signals comprising:
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a magnetic resonance local coil assembly comprising a plurality of channels; a first of said channels comprising a first individual antenna configured to receive a first magnetic resonance signal and a first frequency converter connected to said first individual antenna, said first frequency converter being configured to form a first signal from said first magnetic resonance signal and a first oscillator signal supplied to said first frequency converter; a second of said channels comprising a second individual antenna configured to receive a second magnetic resonance signal and a second frequency converter connected to said second individual antenna, said second frequency converter being configured to form a second signal from said second magnetic resonance signal and a second oscillator signal supplied to said second frequency converter; a signal combiner supplied with said first signal and said second signal that applies both of said first signal and said second signal to a single transmission path forming an output of said local coil assembly; a first input to said local coil assembly to which a first synthesizer signal is supplied, said first synthesizer signal having a first synthesizer signal frequency; a second input to said local coil assembly to which a second synthesizer is supplied, said second synthesizer signal having a second synthesizer signal frequency; and an oscillator signal source in said local coil assembly connected to said first and second inputs, said oscillator signal source supplying said first oscillator signal to said first frequency converter and supplying said second oscillator signal to said second frequency converter, and said oscillator signal source being configured to form at least one of said first and second oscillator signals with an oscillator signal frequency that is a difference between said first synthesizer signal frequency and said second synthesizer signal frequency, said first and second synthesizer signal frequencies being set so that said difference, corresponding to said oscillator signal frequency, allows said first and second signals to both be transmitted via said single transmission path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for transmitting magnetic resonance signals in a magnetic resonance local coil assembly comprising a plurality of channels, said method comprising the steps of;
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in a first of said channels, receiving a first magnetic resonance signal with a first individual antenna and supplying said first magnetic resonance signal to a first frequency converter connected to said first individual antenna, and in said first frequency converter, forming a first signal from said first magnetic resonance signal and a first oscillator signal supplied to said first frequency converter; in a second of said channels, receiving a second magnetic resonance signal with a second individual antenna and supplying said second magnetic resonance signal to a second frequency converter connected to said second individual antenna, and in said second frequency converter, forming a second signal from said second magnetic resonance signal and a second oscillator signal supplied to said second frequency converter; combining said first signal and said second signal and applying both of said first signal and said second signal to a single transmission path forming an output of said local coil assembly; at a first input to said local coil assembly, supplying a first synthesizer signal, said first synthesizer signal having a first synthesizer signal frequency; at a second input to said local coil assembly, supplying a second synthesizer, said second synthesizer signal having a second synthesizer signal frequency; and from an oscillator signal source in said local coil assembly connected to said first and second inputs, supplying said first oscillator signal to said first frequency converter and supplying said second oscillator signal to said second frequency converter, and in said oscillator signal source, forming at least one of said first and second oscillator signals with an oscillator signal frequency that is a difference between said first synthesizer signal frequency and said second synthesizer signal frequency, and setting said first and second synthesizer signal frequencies so that said difference, corresponding to said oscillator signal frequency, allows said first and second signals to both be transmitted via said single transmission path. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification