Simultaneous TX-RX for MRI systems and other antenna devices

摘要

Apparatus and method that are more efficient and flexible, and obtain and connect high-power RF transmit signals (TX) to RF-coil devices in an MR machine or other devices and simultaneously receive signals (RX) and separate net receive signals NRX) of interest by subtracting or filtering to remove the subtractable portion of the transmit signal (STX) from the RX and preamplifying the NRX and signal processing the preamplified NRX. In some embodiments, signal processing further removes artifacts of the transmitted signal, e.g., by digitizing the NRX signal, storing the digitized NRX signal in a memory, and performing digital signal processing. In some embodiments, the present invention also includes pre-distorting the TX signals in order to be better able to identify and/or remove the remaining artifacts of the transmitted signal from the NRX signal. This solution also applies to other high-power RF-transmit-antennae signals.

主权项

1. A method comprising:
providing a magnetic-resonance (MR) coil having a plurality of antenna elements; locating the MR coil in a bore of an MR magnet; transmitting an MR transmit signal (TX signal) using the MR coil; receiving an MR receive signal (RX signal) using the MR coil simultaneously with the transmitting of the MR transmit signal (TX signal); removing artifacts of the TX signal from the received MR receive signal (RX signal) to form a net received signal (NRX signal),wherein the removing artifacts of the transmit signal from the received MR receive signal further includes:
splitting an RF pulse into a first portion and a second portion, wherein the first portion is amplified and transmitted as the MR transmit signal (TX), and subtracting the second portion from the received MR receive signal (RX) to form the NRX signal; and processing the net received signal (NRX signal) and generating MR output data from the processed NRX signal.