MR IMAGING USING MULTI-CHANNEL RF EXCITATION

摘要

The invention relates to a magnetic resonance imaging apparatus comprising an array of two or more RF antennas(9) for transmitting RF pulses to and receiving MR signals from a body(7) of a patient positioned in an examination volume (2), the RF antennas (9) having spatial transmit and receive sensitivity profiles. The apparatus is arranged to: -control the temporal succession, the phase, and the amplitude of the RF feeding of each individual RF antenna (9), the phases and amplitudes being determined from the spatial transmit sensitivity profiles of the RF antennas(9), and -reconstruct a MR image from a combination of the received MR signals received via the individual RF antennas(9) and from the spatial receive sensitivity profiles of the RF antennas(9). The invention proposes that the apparatus is further arranged to: -determine the spatial transmit sensitivity profiles of the RF antennas (9) from the spatial receive sensitivity profiles of the RF antennas (9), or -determine the spatial receive sensitivity profiles of the RF antennas (9) from the spatial transmit sensitivity profiles of the RF antennas (9).