Device and method for an asymmetrical bus interface for a local coil

1. A local coil comprising:

at least one sensor arranged within a housing of the local coil, wherein the at least one sensor is configured to detect data of a magnetic resonance tomography system;

an oscillator arranged within the housing of the local coil;

a modulator arranged within the housing of the local coil, wherein the modulator is configured to modulate the data from the at least one sensor onto a carrier frequency of the oscillator to provide a modulated carrier frequency; and

a signal output in signal communication with the at least one sensor for outputting the modulated data,

wherein the at least one sensor is configured to transmit a plurality of data items generated from the data via the signal output to a control unit of the magnetic resonance tomography system.

2. The local coil of claim 1 , wherein the local coil is configured to transmit the modulated carrier frequency in a common signal line with a magnetic resonance signal.

3. The local coil of claim 2 , wherein the at least one sensor comprises a magnetic field sensor for detecting a static magnetic field of the magnetic resonance tomography system.

4. The local coil of claim 3 , wherein the at least one sensor is configured to a combine the plurality of data items to form a data packet with a frame and to transmit the frame via the signal output by the modulator.

5. The local coil of claim 4 , further comprising:

a signal input configured to transmit data of the magnetic resonance tomography system to the local coil with signal communication to the at least one sensor,

wherein the signal output is configured for a higher data transmission rate than the signal input and the at least one sensor is configured, on a request via the signal input, to transmit the plurality of data items via the signal output.

6. The local coil of claim 1 , wherein the at least one sensor comprises a magnetic field sensor for detecting a static magnetic field of the magnetic resonance tomography system.

7. The local coil of claim 1 , wherein the at least one sensor is configured to a combine the plurality of data items to form a data packet with a frame and to transmit the frame via the signal output by the modulator.

8. The local coil of claim 1 , further comprising:

a signal input configured to transmit data of the magnetic resonance tomography system to the local coil with signal communication to the at least one sensor,

wherein the signal output is configured for a higher data transmission rate than the signal input and the at least one sensor is configured, on a request via the signal input, to transmit the plurality of data items via the signal output.

9. A system comprising:

a local coil comprising:

at least one sensor arranged within a housing of the local coil, wherein the at least one sensor is configured to detect data of a magnetic resonance tomography system;

an oscillator arranged within the housing of the local coil;

a modulator arranged within the housing of the local coil, wherein the modulator is configured to modulate the data from the at least one sensor onto a carrier frequency of the oscillator to provide a modulated carrier frequency; and

a signal output in signal communication with the at least one sensor for outputting the modulated data,

wherein the at least one sensor is configured to transmit a plurality of data items generated from the data via the signal output; and

a magnetic resonance tomography system comprising a receiver for receiving a magnetic resonance signal from the local coil,

wherein the local coil is configured to be connected to the magnetic resonance tomography system via a signal line, and

wherein the receiver is configured to receive the carrier frequency of the oscillator of the local coil and comprises a demodulator configured to demodulate the modulated data from the at least one sensor.

10. The system of claim 9 , wherein the receiver of the magnetic resonance tomography system is configured to digitize the received magnetic resonance signal and, in dependence on a control signal, to demodulate certain time sections of the received magnetic resonance signal.

11. The system of claim 10 , wherein the local coil comprises a signal input configured to transmit data to the local coil with signal communication to the at least one sensor,

wherein the magnetic resonance tomography system is configured to send a request to the local coil via the signal input and, in a predetermined time relative to the request, to send the control signal to the receiver so that the receiver demodulates a first section.

12. The system of claim 11 , wherein the magnetic resonance tomography system comprises a decimator configured to reduce the plurality of data items.

13. The system of claim 10 , wherein the receiver is configured to demodulate the modulated data via plurality of time sections of adjoining time sections.

14. The system of claim 9 , wherein the at least one sensor is configured to a combine the plurality of data items to form a data packet with a frame and to transmit the frame via the signal output by the modulator, and

wherein the demodulator comprises a correlator configured to identify a start of the frame in the received signal and to demodulate the data packet.

15. A method for transmitting data from at least one sensor in a local coil to a magnetic resonance tomography system, wherein the local coil comprises the at least one sensor, an oscillator, a modulator, and a signal output, the method comprising:

generating a plurality of data items by detection of data of the magnetic resonance tomography system by the at least one sensor arranged within a housing of the local coil;

generating a carrier frequency by the oscillator arranged within the housing of the local coil;

modulating the carrier frequency with the data by the modulator arranged within the housing of the local coil; and

outputting, via the signal output, the modulated carrier frequency to a control unit of the magnetic resonance tomography system.

16. The method of claim 15 , further comprising:

receiving, by a receiver of the magnetic resonance tomography system, magnetic resonance signals from the signal output of the local coil; and

demodulating, by the receiver, the modulated carrier frequency.

17. The method of claim 16 , further comprising:

sending a request from the magnetic resonance tomography system to the local coil via a signal input of the local coil;

sending a control signal to the receiver at a predetermined time relative to the request; and

demodulating the carrier frequency in a predetermined time section.

18. The method of claim 15 , further comprising:

sending a request from the magnetic resonance tomography system to the local coil via a signal input of the local coil;

sending a control signal to a receiver of the magnetic resonance tomography system at a predetermined time relative to the request; and

demodulating the carrier frequency in a predetermined time section.

19. The local coil of claim 1 , wherein the data is an ambient condition of the local coil, a specific absorption rate (SAR) exposure, a temperature of the local coil, a spatial location of the local coil, or a combination thereof.

20. The system of claim 9 , wherein the data is an ambient condition of the local coil, a specific absorption rate (SAR) exposure, a temperature of the local coil, a spatial location of the local coil, or a combination thereof.