High resolution radio frequency medical imaging and therapy system

An imaging system, comprising:

• a set of antennas, which are arranged to direct a plurality of radio frequency (RF) beams toward a target organ from a respective plurality of antenna locations, the plurality of the RF beams comprising one or more first pairs of the RF beams, each first pair comprising two of the RF beams that impinge on the target organ from opposite directions;
• a receiver, which is arranged to receive via the set of antennas RF signals reflected from the target organ responsively to the RF beams, the RF signals comprising one or more second pairs of the RF signals engendered respectively by the one or more first pairs of the RF beams;
• and
• a processor, which is arranged to compensate for local tissue artifacts in the RF signals by jointly processing the RF signals in each of the second pairs, and to calculate three-dimensional (3-D) velocity vectors of multiple points in the target organ with respect to the antenna locations using the RF signals after compensating for the local tissue artifacts.

A method for radio frequency (RF) ablation, comprising:

• directing a plurality of RF beams toward a target organ from a respective plurality of angles, the plurality of the RF beams comprising one or more first pairs of the RF beams, each first pair comprising two of the RF beams that impinge on the target organ from opposite directions;
• receiving RF signals reflected from the target organ responsively to the RF beams, the RF signals comprising one or more second pairs of the RF signals engendered respectively by the one or more first pairs of the RF beams;
• using a processor to extract local tissue parameters at multiple points in the target organ by jointly processing the RF signals in each of the second pairs;
• and
• focusing an ablating signal on an ablation region in the target organ using multiple ablation beams based on the extracted local tissue parameters.

A radio frequency (RF) ablation system, comprising:

• one or more antennas, which are arranged to direct a plurality of RF beams toward a target organ from a respective plurality of angles, the plurality of the RF beams comprising one or more first pairs of the RF beams, each first pair comprising two of the RF beams that impinge on the target organ from opposite directions;
• a receiver, which is arranged to receive via the one or more antennas RF signals reflected from the target organ responsively to the RF beams, the RF signals comprising one or more second pairs of the RF signals engendered respectively by the one or more first pairs of the RF beams;
• a transmitter, which is arranged to transmit an ablating signal toward an ablation region in the target organ via the one or more antennas;
• and
• a processor, which is arranged to extract local tissue parameters at multiple points in the target organ by jointly processing the RF signals in each of the second pairs, and to cause the ablating signal to be focused on the ablation region in the target organ based on the extracted local tissue parameters.