US 11,860,252 B2
MR system with partial shielding cabin and method for operation
Jürgen Nistler, Erlangen (DE); Rainer Schneider, Erlangen (DE); Georg Seegerer, Erlangen (DE); and Stephan Kannengießer, Wuppertal (DE)
Assigned to Siemens Healthcare GmbH, Erlangen (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on Mar. 9, 2022, as Appl. No. 17/690,125.
Claims priority of application No. 10 2021 202 235.9 (DE), filed on Mar. 9, 2021; and application No. 10 2021 202 236.7 (DE), filed on Mar. 9, 2021.
Prior Publication US 2022/0291310 A1, Sep. 15, 2022
Int. Cl. G01R 33/36 (2006.01); G01R 33/421 (2006.01); G01R 33/58 (2006.01)
CPC G01R 33/36 (2013.01) [G01R 33/4215 (2013.01); G01R 33/583 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic resonance tomography unit comprising:
a field magnet;
a transmitter;
a transmitting antenna operable to excite nuclear spins;
a calibration antenna configured to receive a calibration signal; and
a transmission interference suppression facility comprising:
a transmission interference suppression controller;
a plurality of sensors; and
a transmission interference suppression antenna,
wherein the transmission interference suppression facility is configured to:
pick up, with the plurality of sensors, an excitation signal of the transmitter;
determine, with the transmission interference suppression controller, a transmission interference suppression signal as a function of the excitation signal of the transmitter; and
emit the transmission interference suppression signal via the transmission interference suppression antenna, so that at a predetermined location outside of the magnetic resonance tomography unit, an electromagnetic alternating field of an excitation signal emitted by the transmitter via the transmitting antenna is attenuated, and
wherein the plurality of sensors are arranged in a near field of the transmitting antenna, and the predetermined location of the attenuation is in a far field of the transmitting antenna, and
wherein the calibration antenna is arranged at a greater spacing from the transmitting antenna than the plurality of sensors.