US 11,940,513 B2
Method and apparatus for suppressing interference emissions in magnetic resonance systems
Stephan Biber, Erlangen (DE); Jürgen Nistler, Erlangen (DE); and Markus Vester, Nuremberg (DE)
Assigned to Siemens Healthineers AG, Forchheim (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Sep. 15, 2021, as Appl. No. 17/476,459.
Claims priority of application No. 10 2020 211 602.4 (DE), filed on Sep. 16, 2020; application No. 10 2020 211 606.7 (DE), filed on Sep. 16, 2020; and application No. 10 2020 211 608.3 (DE), filed on Sep. 16, 2020.
Prior Publication US 2022/0082642 A1, Mar. 17, 2022
Int. Cl. G01R 33/36 (2006.01); G01R 33/34 (2006.01)
CPC G01R 33/3692 (2013.01) [G01R 33/34038 (2013.01); G01R 33/3614 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A magnetic resonance tomography unit comprising:
a magnet unit;
a transmitter;
a transmitter antenna operable to excite nuclear spins;
a transmission interference suppression device comprising:
a transmission interference suppression control system;
a sensor; and
a transmission interference suppression antenna,
wherein the transmission interference suppression device is configured to:
acquire, with the sensor, an excitation signal of the transmitter for exciting nuclear spins;
determine, with the transmission interference suppression control system, a transmission interference suppression signal dependent upon the acquired excitation signal of the transmitter; and
transmit the transmission interference suppression signal via the transmission interference suppression antenna, so that at a predetermined location outside the magnetic resonance tomography unit, the excitation signal emitted by the transmitter via the transmitter antenna is attenuated,
wherein the sensor is arranged in a far field of the transmitter antenna, and the predetermined location of the attenuation is a location of the sensor, and
wherein the predetermined location is specified by a distance defined by regulation for an EMC limit value.