#$%^&*AU2019204483A120200227.pdf#####ABSTRACT A probe includes an elastic element having first and second ends, a transmitter, one or more receiving antennas 5 and one or more narrow-band amplifiers. The transmitter is coupled to the first end and is configured to transmit signals in a given range of frequencies. The one or more receiving antennas are coupled to the second end and are configured to receive the signals. The one or more narrow10 band amplifiers have a pass-band that matches the given range of frequencies and are configured to amplify the signals received by the one or more receiving antennas, respectively.1/2 0) 00 CV) cn cn 04 (D LL cn Q) 04 CV) CY) 04 C14 Q) cn cq cn Q) cq 04 04 cq C%4 00 CN cn 04 co
