Activation of transmit/receive arrays for decoupling during transmission

摘要

A system for electromagnetic excitation of an object under examination during magnetic resonance tomography includes a radio frequency (RF) device for generating a radio-frequency signal and a plurality of antennas for emitting the radio-frequency signal. A signal connection exists between the output of the RF device and the plurality of antennas. A source impedance of the signal connection to the output of the RF device at a connection point of the plurality of antennas is significantly higher than the impedance of the plurality of antennas at the connection points, so that the plurality of antennas are fed in a current source feed mode if a radio-frequency signal is present.

主权项

1. A system for electromagnetic excitation of an object under examination during magnetic resonance tomography, the system comprising:
a radio frequency (RF) device configured to generate a radio-frequency signal; a plurality of antennas configured to emit the radio-frequency signal; and a signal connection between an output of the RF device and the plurality of antennas, wherein a source impedance of the signal connection with the output of the RF device at connection points of the plurality of antennas is higher than an impedance of the plurality of antennas at the connection points, so that the plurality of antennas are fed in a current source feed mode when the radio-frequency signal is present.