Magnetic resonance tomography system and method for operating a magnetic resonance tomography system
The present disclosure relates to a magnetic resonance tomography system in which the field generation unit can be replaced by a digital emulation. Activation signals of a conventional system can be provided to this digital emulation. The digital emulation of the field generation unit outputs output signals that correspond to output signals of a hardware-based field generation unit.
1 . A magnetic resonance imaging system, comprising:
a physical field generator;
processing circuitry;
a controller configured to generate activation signals for activating the physical field generator, and to selectively provide the generated activation signals to one of the physical field generator or the processing circuitry,
wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to receive the activation signals and to use the activation signals to generate calculated output signals that simulate output signals of the physical field generator,
wherein, when the generated activation signals are provided to the physical field generator, the physical field generator is configured to receive the generated activation signals and to use the generated activation signals to generate physical output signals; and
evaluator circuitry configured to generate image data using (i) the calculated output signals or (ii) the physical output signals.
2 . The magnetic resonance imaging system as claimed in claim 1 , wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to generate the calculated output signals using a Bloch simulation.
3 . The magnetic resonance imaging system as claimed in claim 1 , further comprising:
modeling circuitry configured to provide modeling data relating to a virtual specimen for the magnetic resonance imaging system,
wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to generate the calculated output signals using the modeling data.
4 . The magnetic resonance imaging system as claimed in claim 3 , further comprising:
a storage device configured to store previously-measured or calculated modeling data,
wherein the modeling circuitry is configured to read out the modeling data that is stored in the storage device and, when the generated activation signals are provided to the processing circuitry, to provide the modeling data to the processing circuitry.
5 . The magnetic resonance imaging system as claimed in claim 3 , further comprising:
a computing device configured to calculate the modeling data using user inputs and/or previously-stored specifications.
6 . The magnetic resonance imaging system as claimed in claim 3 , wherein the modeling data comprises parameters or characteristic properties of an organic body or an organ thereof.
7 . The magnetic resonance imaging system as claimed in claim 1 , wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to generate the calculated output signals in real time.
8 . The magnetic resonance imaging system as claimed in claim 1 , wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to receive the generated activation signals for as digital data.
9 . The magnetic resonance imaging system as claimed in claim 1 , wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to generate the calculated output signals as digital data.
10 . The magnetic resonance imaging system as claimed in claim 1 , wherein the generated activation signals comprise electrical and/or optical signals.
11 . The magnetic resonance imaging system as claimed in claim 1 , wherein, when the generated activation signals are provided to the processing circuitry, the processing circuitry is configured to generate the calculated output signals as electrical and/or optical signals.
12 . A method for operating a magnetic resonance imaging system including a physical field generator and processing circuitry, the method comprising:
generating activation signals for activating the physical field generator;
selectively providing the generated activation signals to one of the physical field generator or the processing circuitry;
when the generated activation signals are provided to the processing circuitry:
receiving, via processing circuitry, the generated activation signals;
generating, via the processing circuitry, calculated output signals that simulate output signals of the physical field generator; and
outputting the generated calculated output signals; and
when the generated activation signals are provided to the physical field generator:
receiving the generated activation signals and using the generated activation signals to generate physical output signals; and
generating image data using (i) the calculated output signals or (ii) the physical output signals.
13 . The method as claimed in claim 12 , wherein the generating the calculated output signals comprises using model data relating to a virtual specimen.