Method for controlling a magnetic resonance apparatus and controller for a magnetic resonance apparatus
In a method and controller for controlling a magnetic resonance system, a sequence of synchronized control commands is transmitted to different system components of the magnetic resonance system. For different system components a number of control commands is supplied in a relative chronological order in relation to a defined system time, wherein the control commands in the relative chronological order are each allocated times that specify when a particular control command should be executed in relation to a defined system time. The control commands are passed in the relative chronological order to a data-converting interface, which forwards the control commands in a latency-compensating data transfer protocol via a bus system, which has a deterministic latency, to the individual system components.
1. A method for controlling a magnetic resonance system comprising:
in a data supply processor of a magnetic resonance system, formulating a plurality of individual control commands for respectively operating a plurality of different system components of a magnetic resonance system, and organizing said plurality of control commands in a relative chronological order with respect to a defined system clock, and allocating, to each respective control command in said relative chronological order, an allocated time that specifies when the respective control command should be executed relative to the other control commands in said relative chronological order;
transferring said control commands in said relative chronological order from said data supply processor to a data-converting interface and, from said data-converting interface forwarding the control commands to the different system components via a bus system that exhibits a known latency, including a known maximum latency; and
in said data-converting interface, generating a latency-compensating data transfer protocol that includes said control commands with said respective allocated times adjusted dependent on said known latency of said bus system, and transmitting said control commands to said different system components according to said latency-compensating data transfer protocol with a lead time that is longer than said known maximum latency.
2. A method as claimed in claim 1 comprising using a serial multi-gigabit bus system as said bus system.
3. A method as claimed in claim 1 comprising using a JESD204B protocol as said latency-compensating data transfer protocol.
4. A controller for a magnetic resonance system comprising:
a data supply processor configured to formulate a plurality of individual control commands for respectively operating a plurality of different system components of a magnetic resonance system, and organizing said plurality of control commands in a relative chronological order with respect to a defined system clock, and allocating, to each respective control command in said relative chronological order, an allocated time that specifies when the respective control command should be executed relative to the other control commands in said relative chronological order;
a data-converting interface in communication with said data supply processor, said data supply processor being configured to transfer said control commands in said relative chronological order from said data supply processor to said data-converting interface;
said data-converting interface being configured to forward the control commands to the different system components via a bus system that exhibits a known latency, including a known maximum latency; and
said data-converting interface being configured to generate a latency-compensating data transfer protocol that includes said control commands with said respective allocated times adjusted dependent on said known latency of said bus system, and to transmit said control commands to said different system components according to said latency-compensating data transfer protocol with a lead time that is longer than said known maximum latency.
5. A magnetic resonance apparatus comprising:
a magnetic resonance data acquisition scanner comprising a basic field magnet, a gradient coil arrangement, a radio-frequency transmitter and a radio-frequency receiver, collectively representing a plurality of different system components;
a data supply processor configured to formulate a plurality of individual control commands for respectively operating a plurality of different system components of a magnetic resonance system, and organizing said plurality of control commands in a relative chronological order with respect to a defined system clock, and allocating, to each respective control command in said relative chronological order, an allocated time that specifies when the respective control command should be executed relative to the other control commands in said relative chronological order;
a data-converting interface in communication with said data supply processor;
said data supply processor being configured to transfer said control commands in said relative chronological order from said data supply processor to said data-converting interface;
said data-converting interface being configured to forward the control commands to the different system components via a bus system that exhibits a known latency, including a known maximum latency; and
said data-converting interface being configured to generate a latency-compensating data transfer protocol that includes said control commands with said respective allocated times adjusted dependent on said known latency of said bus system, and to transmit said control commands to said different system components according to said latency-compensating data transfer protocol with a lead time that is longer than said known maximum latency.