EMI reduction with specific coding of counter signals
Apparatuses and a method for transmitting a counter signal in an imaging system are provided. Counter states of the counter signal are Gray coded to Gray coded counter states before transmission. Every second Gray coded counter state is inverted to an inverted counter state. The Gray coded counter states inverted in every second counter state are transmitted and are decoded on receipt.
1. A method for transmitting a counter signal in an imaging system, the method comprising:
coding counter states of the counter signal to Gray coded counter states before transmission;
inverting every second Gray coded counter state of the Gray coded counter states to an inverted counter state; and
transmitting the inverted counter states.
2. The method as claimed in claim 1 , wherein bits of a binary counter state to be transmitted are identical to bits in identical positions in a maximum of one binary counter state transmitted after the binary counter state, and
wherein the bits of the binary counter state are different from bits in the identical positions in a binary counter state transmitted next after the one binary counter state.
3. The method as claimed in claim 1 , wherein transmitting the inverted counter states comprises transmitting the inverted counter states of the counter signal by radio or by way of a cable connection over a transmission path between components of the imaging system.
4. The method as claimed in claim 1 , wherein the imaging system is a magnetic resonance tomography system.
5. An apparatus for processing a counter signal to be transmitted in an imaging system, the apparatus comprising:
a Gray coding device configured to Gray code counter states of the counter signal to Gray coded counter states before transmission; and
an inversion device configured to invert every second Gray coded counter state.
6. The apparatus as claimed in claim 5 , wherein the apparatus is configured so that bits of a binary counter state to be transmitted are identical to bits in identical positions in a maximum of one binary counter state transmitted next after the binary counter state, and
wherein the bits of the binary counter state are different from the bits in the identical positions in a binary counter state one after the one binary counter state.
7. The apparatus as claimed in claim 5 , wherein the apparatus is configured so that the Gray coded counter states of the counter signal are transmitted by radio or by way of a cable connection over a transmission path between components of the imaging system.
8. The apparatus as claimed in one of claim 5 , wherein the imaging system is a magnetic resonance tomography system.
9. A method for processing a counter signal in an imaging system, the method comprising:
coding counter states of the counter signal to Gray coded counter states before transmission;
inverting every second Gray coded counter state of the Gray coded counter states to an inverted counter state;
transmitting the inverted counter states;
receiving the inverted counter states;
inverting every second inverted counter state of the received inverted counter states to the Gray coded counter state; and
converting the Gray coded counter states to binary code coded counter states.