7T
spine array based on electric dipole antenna starts to gain attention recently.
Nevertheless, the transmit efficiency of the dipole has a natural decay from
the feeding point, which does not necessarily corresponding to the target
imaging area. In addition, a variety of patient size requires the dipole to be
reconfigured for optimum performance. In this work, we propose a concept of
“segmented dipole” that can be remotely reconfigured for transmit field-of-view
shifting, tuning, and impedance matching characteristics without the need of a
parallel-transmit system. A prototype transmitter was built and the
reconfiguration capability was demonstrated at a 7T scanner.
