Respiratory detection transceiver

A magnetic resonance imaging (MRI) device configured to exert a high-frequency electromagnetic field on an object under test in a static magnetic field, and to reconstruct an image based on acquired magnetic resonance signals, the MRI device comprising:

• a receiving coil comprising a plurality of receiving coil elements, the receiving coil being configured to receive magnetic resonance signals and couple the magnetic resonance signals to a receiver;
• and
• a coupler configured to be coupled with at least a first receiving coil element of the plurality of receiving coil elements of the receiving coil, the coupler being directionally coupled with the receiver, the first receiving coil element being configured to receive a high-frequency electromagnetic wave signal through the coupler,
• wherein a directional coupling between the coupler and the receiver is regulated such that the first receiving coil element transmits the high-frequency electromagnetic wave signal to the object under test to detect a physiological movement signal of the object under test.